Master-Tools

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

18-8 Stainless Steel ButtonHead Hex Drive Screws

18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic.

Metric 18-8 Stainless SteelButton Head Hex Drive Screws

316 Stainless Steel ButtonHead Hex Drive Screws

More corrosion resistant than 18-8 stainless steel screws, these button head screws have excellent resistance to chemicals and salt water. They may be mildly magnetic.

Metric 316 Stainless SteelButton Head Hex Drive Screws

316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. They may be mildly magnetic.

Fine-Thread Metric 316 StainlessSteel Button Head Hex Drive Screws

Closely spaced threads on these screws fit in holes with a fine pitch. They're not compatible with standard metric threads.

Alloy Steel Button Head Hex Drive Screws

Metric Alloy Steel Button Head Hex Drive Screws

These metric alloy steel screws are nearly twice as strong as stainless steel button head screws.

Brass Button Head Hex Drive Screws

Brass button head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Metric Brass Button Head Hex Drive Screws

Made from brass, these metric button head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Metric Titanium Button Head Hex Drive Screws

As strong as alloy steel and about 40% lighter, these metric titanium screws are known for their high strength-to-weight ratio. They stand up to salt water, acids, and chemicals.

Titanium Button Head Hex Drive Screws

Known for their high strength-to-weight ratio, these titanium screws are as strong as alloy steel and about 40% lighter. They stand up to salt water, acids, and chemicals.

18-8 Stainless Steel Pan Head Phillips Screws

18-8 stainless steel pan head screws have good chemical resistance and may be mildly magnetic.

Metric 18-8 Stainless SteelPan Head Phillips Screws

Made from 18-8 stainless steel, these metric pan head screws have good chemical resistance and may be mildly magnetic.

316 Stainless Steel Pan Head Phillips Screws

More corrosion resistant than 18-8 stainless steel screws, these pan head screws have excellent resistance to chemicals and salt water. They may be mildly magnetic.

Metric 316 Stainless SteelPan Head Phillips Screws

These metric 316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. They may be mildly magnetic.

Mil. Spec. Stainless SteelPan Head Phillips Screws

Choose these screws for their adherence to strict military standards for material and construction.

JIS Stainless Steel Pan Head Screws

Made to Japanese Industrial Standards, these screws have narrower and shorter heads than standard Phillips pan head screws.

Steel Pan Head Phillips Screws

These steel pan head screws are coated for corrosion resistance.

Metric Steel Pan Head Phillips Screws

A zinc plating makes these metric pan head screws corrosion resistant in wet environments.

JIS Steel Pan Head Screws

Made to Japanese Industrial Standards, these screws have narrower and shorter heads than standard Phillips pan head screws.

Mil. Spec. Steel Pan Head Phillips Screws

Choose these screws for their adherence to strict military standards for material and construction.

Nylon Pan Head Phillips Screws

Nylon pan head screws are chemical and oil resistant, nonconductive, and lightweight. Exposure to moisture may cause them to expand.

Metric Nylon Pan Head Phillips Screws

Made from nylon, these metric pan head screws are chemical and oil resistant, nonconductive, and lightweight. Exposure to moisture may cause them to expand.

Metric High-Strength High-TemperaturePEEK Pan Head Phillips Screws

These metric PEEK screws are reliable in harsh environments up to 500° F and withstand acids, bases, and salt solutions. All are chemical and oil resistant, nonconductive, and lightweight.

High-Strength High-TemperaturePEEK Pan Head Phillips Screws

Reliable in harsh environments up to 500° F, PEEK screws withstand acids, bases, and salt solutions. They are chemical and oil resistant, nonconductive, and lightweight.

Impact-Resistant PolycarbonatePan Head Phillips Screws

Polycarbonate screws resist breaking in high-impact applications. All are chemical and oil resistant, nonconductive, and lightweight.

Metric Impact-Resistant PolycarbonatePan Head Phillips Screws

Made from polycarbonate, these metric pan head screws resist breaking in high-impact applications. They are chemical and oil resistant, nonconductive, and lightweight.

Brass Pan Head Phillips Screws

Brass pan head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Metric Brass Pan Head Phillips Screws

Made from brass, these metric pan head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Titanium Pan Head Phillips Screws

Our most corrosion-resistant screws, these titanium pan head screws withstand salt water, acids, and chemicals. They have a high strength-to-weight ratio.

Metric Titanium Pan Head Phillips Screws

The most corrosion-resistant pan head screws we offer, these metric titanium screws withstand salt water, acids, and chemicals. They have a high strength-to-weight ratio.

18-8 Stainless Steel Extra-WideTruss Head Phillips Screws

These 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. The extra-wide truss head distributes holding pressure to reduce the likelihood of crushing thin material.

Metric 18-8 Stainless Steel Extra-WideTruss Head Phillips Screws

Made from 18-8 stainless steel, these metric screws have good chemical resistance and may be mildly magnetic. The extra-wide truss head distributes holding pressure to reduce the likelihood of crushing thin material.

316 Stainless Steel Extra-WideTruss Head Phillips Screws

More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. The extra-wide truss head distributes holding pressure to reduce the likelihood of crushing thin material. Screws may be mildly magnetic.

Metric 316 Stainless Steel Extra-WideTruss Head Phillips Screws

These metric 316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. The extra-wide truss head distributes holding pressure to reduce the likelihood of crushing thin material. Screws may be mildly magnetic.

Stainless Steel DecorativeRound Head Phillips Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Steel Decorative Round Head Phillips Screws

A zinc plating provides mild corrosion resistance.

Narrow Cheese Head Phillips Screws

A narrow head allows these screws to fit in tight spaces and a deep drive lets you maximize driving power.

High-Profile Narrow Fillister Head Phillips Screws

Taller than cheese head screws, these have a deep drive to maximize driving power and a narrow diameter to fit in tight spaces.

18-8 Stainless Steel Pan Head Slotted Screws

18-8 stainless steel pan head screws have good chemical resistance and may be mildly magnetic.

Metric 18-8 Stainless SteelPan Head Slotted Screws

Good for use outdoors and in washdown environments, these metric 18-8 stainless steel screws are more corrosion resistant than steel and nearly as strong. Their pan-shaped head sits nearly flat on the fastened surface, so there’s no need to countersink a hole.

316 Stainless Steel Pan Head Slotted Screws

More corrosion resistant than 18-8 stainless steel screws, these pan head screws have excellent resistance to chemicals and salt water. They may be mildly magnetic.

Metric 316 Stainless SteelPan Head Slotted Screws

These metric 316 stainless steel pan head screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. They may be mildly magnetic.

Metric Steel Pan Head Slotted Screws

Install these metric pan head screws for a low-profile, finished look—no countersink required.

Steel Pan Head Slotted Screws

These pan head screws are zinc plated for corrosion resistance in wet environments.

Nylon Pan Head Slotted Screws

Nylon screws are chemical and oil resistant, nonconductive, and lightweight. Exposure to moisture may cause them to expand.

Metric Nylon Pan Head Slotted Screws

Made from nylon, these metric screws are chemical and oil resistant, nonconductive, and lightweight. Exposure to moisture may cause them to expand.

Extreme-Temperature Chemical-ResistantPTFE Pan Head Slotted Screws

PTFE screws withstand harsh chemicals and temperatures from -100° F to 500° F. They are nonconductive, lightweight, and resist wear due to their slippery surface.

Metric Extreme-Temperature Chemical-ResistantPTFE Pan Head Slotted Screws

These metric PTFE screws withstand harsh chemicals and temperatures from -100° F to 500° F. They are nonconductive, lightweight, and resist wear due to their slippery surface.

Brass Pan Head Slotted Screws

Brass pan head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Metric Brass Pan Head Slotted Screws

Made from brass, these metric pan head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

18-8 Stainless Steel NarrowCheese Head Slotted Screws

More corrosion resistant than steel, and almost as strong, these 18-8 stainless steel screws have a narrower head than pan head screws to fit into tight spaces. They’re often used in electrical panels and next to flanges and raised surfaces in humid, damp, and washdown environments, but will corrode if exposed to salt water or chemicals.

316 Stainless Steel NarrowCheese Head Slotted Screws

More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water.

Steel Narrow Cheese Head Slotted Screws

With a narrower head than pan head screws, these cheese head screws fit in tight spaces, such as in electrical panels and next to flanges and raised surfaces.

Plastic Narrow Cheese Head Slotted Screws

Made from nylon, these screws are chemical and oil resistant, nonconductive, and lightweight.

Brass Decorative Round Head Slotted Screws

Made from brass, these screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

18-8 Stainless Steel DecorativeRound Head Slotted Screws

These screws have good chemical resistance.

316 Stainless Steel DecorativeRound Head Slotted Screws

More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water.

Steel Decorative Round Head Slotted Screws

A zinc plating provides mild corrosion resistance.

Aluminum DecorativeRound Head Slotted Screws

One-third the weight of steel, aluminum screws resist corrosion in wet environments.

Nylon Decorative Round Head Slotted Screws

Nylon screws are chemical and oil resistant, nonconductive, and lightweight. Exposure to moisture may cause them to expand.

Extreme-Temperature Chemical-ResistantPTFE Decorative Round Head Slotted Screws

PTFE screws withstand harsh chemicals and temperatures from -100° F to 500° F.

18-8 Stainless Steel High-ProfileNarrow Fillister Head Slotted Screws

These screws have good chemical resistance.

316 Stainless Steel High-ProfileNarrow Fillister Head Slotted Screws

More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water.

Steel High-Profile NarrowFillister Head Slotted Screws

A zinc plating provides mild corrosion resistance.

Brass High-Profile NarrowFillister Head Slotted Screws

Brass screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Plastic High-Profile NarrowFillister Head Slotted Screws

Made from nylon, these screws are chemical and oil resistant, nonconductive, and lightweight.

Low-Profile Ultra-WideTruss Head Slotted Screws

When head height is important, these screws fit into spaces where other wide head screws won't fit. Also known as shutter screws, their ultra-wide truss head distributes the load over a large area for excellent holding pressure.

Metric Low-Profile Ultra-WideTruss Head Slotted Screws

Fit these metric screws into spaces where head height is important and other wide head screws won't fit. Also known as shutter screws, they have an ultra-wide truss head to distribute the load over a large area for excellent holding pressure.

Stainless Steel Binding Head Slotted Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Plastic Binding Head Slotted Screws

Plastic screws are chemical and oil resistant, nonconductive, and lightweight.

Brass Binding Head Slotted Screws

Brass screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Steel Binding Head Slotted Screws

A zinc plating provides mild corrosion resistance.

Stainless Steel Extra-WideTruss Head Slotted Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Steel Extra-Wide Truss Head Slotted Screws

A zinc plating provides mild corrosion resistance.

Metric 18-8 Stainless SteelButton Head Torx Screws

18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. A Torx drive has more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

18-8 Stainless Steel Button Head Torx Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Torx and Torx-Plus drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Metric Steel Button Head Torx Screws

The Torx or Torx-Plus drive on these metric screws have more points of contact than other drives, allowing you to tighten them without damaging the recess.

Alloy Steel Button Head Torx Screws

Made from alloy steel, these screws are three times stronger than standard steel button head Torx screws. A Torx-Plus drive has more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

High-Strength A286 StainlessSteel Button Head Torx Screws

A286 stainless steel screws have comparable strength to alloy steel with the corrosion and chemical resistance of 18-8 stainless steel. They have a Torx drive that has more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Metric High-Strength A286 StainlessSteel Button Head Torx Screws

Made from A286 stainless steel, these metric screws provide the strength of alloy steel and the corrosion and chemical resistance of 18-8 stainless steel. They have a Torx drive that has more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Metric Steel Pan Head Torx Screws

These metric screws have a Torx drive for more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Steel Pan Head Torx Screws

These screws have a Torx or Torx-Plus drive for more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Metric Painted Steel Pan Head Torx Screws

Add a decorative look when fastening parts—these metric screws have a painted head.

Painted Steel Pan Head Torx Screws

Create a decorative appearance on your finished product—the head of these screws is painted.

Metric Stainless Steel Pan Head Torx Screws

These metric 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. Torx drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Stainless Steel Pan Head Torx Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Torx and Torx-Plus drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Pan Head Combination Phillips/Slotted Screws

Made from stainless steel, these screws are chemical resistant and may be mildly magnetic.

Metric Pan Head CombinationPhillips/Slotted Screws

These metric 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic.

Decorative Round HeadCombination Phillips/Slotted Screws

These screws have a tall, domed head that provides a finished appearance. They're zinc plated to resist corrosion in wet environments.

Sanitary Extra-Wide Truss Head Screws

Designed for use in food, pharmaceutical, and other sanitary environments, these screws have an extra-wide truss head that distributes holding pressure to reduce the likelihood of crushing thin materials.

Metric 18-8 Stainless SteelFlanged Button Head Screws

Made from 18-8 stainless steel, these metric screws have good chemical resistance and may be mildly magnetic. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer.

18-8 Stainless Steel FlangedButton Head Screws

18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. The flange distributes pressure across a wide surface, eliminating the need for a separate washer.

Metric 316 Stainless SteelFlanged Button Head Screws

These metric 316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer. Screws may be mildly magnetic.

316 Stainless Steel Flanged Button Head Screws

More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer. Screws may be mildly magnetic.

Alloy Steel Flanged Button Head Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer.

Metric Alloy Steel Flanged Button Head Screws

These metric alloy steel screws are nearly twice as strong as stainless steel button head screws. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer.

Aluminum Ultra-WideFlanged Button Head Screws

These aluminum screws are lightweight and resist corrosion in wet environments. They have a flange that is wider and thicker than our other flanged screws, so they distribute pressure the best.

Metric Aluminum Ultra-WideFlanged Button Head Screws

Made from aluminum, these metric screws are lightweight and resist corrosion in wet environments. The flange is wider and thicker than our other flanged screws, so they distribute pressure the best.

Stainless Steel Ultra-WideFlanged Button Head Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. The flange is wider and thicker than our other flanged screws, so they distribute pressure the best.

Metric Stainless Steel Ultra-WideFlanged Button Head Screws

These metric 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. The flange is wider and thicker than our other flanged screws, so they distribute pressure the best.

Metric Extra-Wide Flanged Button Head Screws

With a flange comparable in size to a washer, these metric screws distribute pressure better than standard flanged screws. Made from 316 stainless steel, they have excellent resistance to chemicals and salt water. Screws may be mildly magnetic.

Extra-Wide Flanged Button Head Screws

Comparable in diameter to a washer, the flange on these screws distributes pressure better than standard flanged screws. Made from 316 stainless steel, they have excellent resistance to chemicals and salt water. Screws may be mildly magnetic.

Stainless Steel Pan Head Screwswith Internal-Tooth Lock Washer

These stainless steel screws have good chemical resistance and may be mildly magnetic. The washer has sharp internal teeth that dig into surfaces to resist large amounts of vibration while the smooth outside edge provides a finished look. Also known as Sems screws, the washer rotates freely but is permanently attached.

Metric Stainless Steel Pan Head Screwswith Internal-Tooth Lock Washer

Made from stainless steel, these metric screws have good chemical resistance and may be mildly magnetic. The washer has sharp internal teeth that dig into surfaces to resist large amounts of vibration while the smooth outside edge provides a finished look. Also known as Sems screws, the washer rotates freely but is permanently attached.

Steel Pan Head Screws withInternal-Tooth Lock Washer

Sharp internal teeth dig into surfaces to resist large amounts of vibration, while the smooth outside edge provides a finished look. Also known as Sems screws, the washer rotates freely but is permanently attached.

Metric Steel Pan Head Screwswith Internal-Tooth Lock Washer

These metric screws have a washer with sharp internal teeth that dig into surfaces to resist large amounts of vibration. The smooth outside edge of the washer provides a finished look. Also known as Sems screws, the washer rotates freely but is permanently attached.

Steel Pan Head Screws withExternal-Tooth Lock Washer

The washer on these screws has sharp external teeth that dig into surfaces for maximum holding power and vibration resistance. Also known as Sems screws, the washer rotates freely but is permanently attached.

Metric Steel Pan Head Screwswith External-Tooth Lock Washer

These metric screws have a washer with sharp external teeth that dig into surfaces for maximum holding power and vibration resistance. Also known as Sems screws, the washer rotates freely but is permanently attached.

Stainless Steel Pan Head Screwswith External-Tooth Lock Washer

Made from stainless steel, these screws have good chemical resistance and may be mildly magnetic. All have a washer with sharp external teeth that dig into surfaces for maximum holding power and vibration resistance. Also known as Sems screws, the washer rotates freely but is permanently attached.

Metric Stainless Steel Pan Head Screwswith External-Tooth Lock Washer

These metric stainless steel screws have good chemical resistance and may be mildly magnetic. All have a washer with sharp external teeth that dig into surfaces for maximum holding power and vibration resistance. Also known as Sems screws, the washer rotates freely but is permanently attached.

Metric Stainless Steel Pan HeadScrews with Spring Lock Washer

These metric stainless steel screws have good chemical resistance and may be mildly magnetic. A curved washer protects delicate surfaces while providing constant tension. Also known as Square Cone Sems screws, the washer rotates freely but is permanently attached.

Stainless Steel Pan HeadScrews with Spring Lock Washer

Made from stainless steel, these screws have good chemical resistance and may be mildly magnetic. A curved washer protects delicate surfaces while providing constant tension. Also known as Square Cone Sems screws, the washer rotates freely but is permanently attached.

Steel Pan Head Screws with Spring Lock Washer

A zinc plating provides mild corrosion resistance.

Pan Head Screws with Flatand Split Lock Washer

The flat washer distributes holding pressure and protects delicate surfaces from damage while the split lock washer adds tension to prevent loosening from small amounts of vibration.

Metric Steel Pan Head Screwswith Split Lock Washer

As you tighten these metric screws, the split lock washer flattens to add tension and prevent loosening from small amounts of vibration. Also known as Sems screws, the washer rotates freely but is permanently attached.

Steel Pan Head Screws with Split Lock Washer

When compressed, the split lock washer flattens to add tension and prevent loosening from small amounts of vibration. Also known as Sems screws, the washer rotates freely but is permanently attached.

Stainless Steel Pan HeadScrews with Split Lock Washer

Stainless steel screws have excellent corrosion resistance in most environments.

Metric Thread-Locking Pan Head Phillips Screws

These metric screws have a nylon patch bonded to the threads that adds friction to prevent loosening from vibration. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

Thread-Locking Pan Head Phillips Screws

A nylon patch bonded to the threads adds friction to prevent loosening from vibration. Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic.

Stainless Steel Thread-LockingButton Head Hex Drive Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. A nylon patch bonded to the threads adds friction to prevent loosening from vibration.

Metric Stainless Steel Thread-LockingButton Head Hex Drive Screws

These metric 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. A nylon patch bonded to the threads adds friction to prevent loosening from vibration.

Alloy Steel Thread-LockingButton Head Hex Drive Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws.

Ultra Vibration-ResistantThread-Locking Rounded Head Screws

The epoxy adhesive on the threads provides twice the holding power of standard thread-locking screws, but requires time to harden.

Wire-Lockable Rounded Head Screws

Wire these screws together through the hole in the head for better vibration resistance than any other rounded head screw.

Stainless Steel Tamper-ResistantButton Head Torx Screws

These 18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. The tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Metric Stainless Steel Tamper-ResistantButton Head Torx Screws

Made from 18-8 stainless steel, these metric button head screws have good chemical resistance and may be mildly magnetic. The tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Metric Sealing Stainless SteelTamper-Resistant Button Head Torx Screws

To prevent unwanted removal, these metric screws have a tamper-resistant Torx drive—also known as a pin-in Torx drive—that makes them difficult to unscrew without special tools. An O-ring under the head blocks leaks and seals out dust and dirt.

Sealing Stainless Steel Tamper-ResistantButton Head Torx Screws

To prevent unwanted removal, these screws have a tamper-resistant Torx drive—also known as a pin-in Torx drive—that makes them difficult to unscrew without special tools. An O-ring under the head blocks leaks and seals out dust and dirt.

Alloy Steel Tamper-ResistantButton Head Torx Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws. Their tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Metric Alloy Steel Tamper-ResistantButton Head Torx Screws

Nearly twice as strong as stainless steel button head screws, these metric screws are made from alloy steel. Their tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Tamper-Resistant DrilledSpanner Pan Head Screws

A tamper-resistant drilled spanner drive makes these screws difficult to remove without special tools. They're 18-8 stainless steel for good chemical resistance and may be mildly magnetic.

Metric Tamper-Resistant DrilledSpanner Pan Head Screws

These metric screws have a drilled spanner drive, making them difficult to remove without special tools. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

Extra-Wide Tamper-ResistantDrilled Spanner Truss Head Screws

The extra-wide head distributes holding pressure to reduce the likelihood of crushing thin materials.

Stainless Steel Tamper-ResistantButton Head Hex Drive Screws

These 18-8 stainless steel button head screws have good chemical resistance and may be mildly magnetic. The tamper-resistant hex drive (also known as a pin-in hex drive) makes them difficult to remove without special tools.

Metric Stainless Steel Tamper-ResistantButton Head Hex Drive Screws

Made from 18-8 stainless steel, these metric button head screws have good chemical resistance and may be mildly magnetic. The tamper-resistant hex drive (also known as a pin-in hex drive) makes them difficult to remove without special tools.

Alloy Steel Tamper-ResistantButton Head Hex Drive Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws.

Stainless Steel Tamper-ResistantOne-Way Round Head Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Steel Tamper-ResistantOne-Way Round Head Screws

A zinc plating provides mild corrosion resistance.

Tamper-Resistant Tri-GrooveRounded Head Screws

Difficult to remove without special tools, these screws have three grooves.

Tamper-Resistant AsymmetricalDrive Button Head Screws

These button head screws have a unique drive that is sold only by McMaster-Carr, making them difficult to remove without a special driver bit. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

Metric Sealing Pan Head Screws

These metric screws have a silicone O-ring that prevents leaks and seals out contaminants. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

Sealing Pan Head Screws

A rubber O-ring prevents leaks and seals out contaminants. Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic.

Vibration-Resistant SealingRounded Head Screws

A nylon patch bonded to the threads adds friction to resist loosening from vibration.

Vented Button Head Screws

These screws are drilled through the shaft to vent fluids and gases trapped under the screw. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

Metric Vented Button Head Screws

To vent fluid and gas trapped under the screw, these metric screws are drilled through the shaft. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

Left-Hand Threaded Button Head Screws

Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic.

Metric Left-Hand Threaded Button Head Screws

Turn these metric screws to the left to tighten; once fastened, they prevent loosening from counterclockwise motion. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic.

Hex-Drive Rounded Head Screw Assortments

These assortments include button head screws.

Phillips Rounded Head Screw Assortments

These assortments include pan head screws.

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