Nylon Patch Screws | McMaster-Carr

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Zinc Yellow-Chromate Plated

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30,000 psi to 99,999 psi

100,000 psi or greater

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Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

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Compliant with Exemptions

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DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

EAR99

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2,445 Products

Socket Head Screws

18-8 Stainless Steel Thread-Locking
Socket Head Screws

These screws have good chemical resistance. A thread locker bonded to the threads prevents loosening from vibration.

Super-Corrosion-Resistant 316 Stainless
Steel Thread-Locking Socket Head Screws

More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. They have a thread locker to resist vibration.

Alloy Steel Thread-Locking Socket Head Screws

With a tensile strength of 170,000 psi, these alloy steel screws are among the strongest we carry. They are stronger than Grade 8 steel screws and are nearly two and a half times stronger than stainless steel thread-locking screws. They have a thread locker to prevent loosening from vibration.

Vibration-Resistant Sealing Socket Head Screws

The nylon patch bonded to the threads of these socket head screws adds friction to keep vibration from loosening them, while their O-ring prevents leaks and seals out contaminants.

Rounded Head Screws

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.

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.

Stainless Steel Thread-Locking
Button 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-Locking
Button 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-Locking
Button Head Hex Drive Screws

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

Vibration-Resistant Sealing Rounded Head Screws

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

Thread-Locking Hex Head Screws

High-Strength Grade 8 Steel
Thread-Locking Hex Head Screws

Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are more than twice as strong as our stainless steel thread-locking screws. The thread locker helps resist loosening from vibration.

Medium-Strength Metric Class 8.8 Steel
Thread-Locking Hex Head Screws

These Class 8.8 steel screws are suitable for fastening most machinery and equipment. They are over 50% stronger than stainless steel thread-locking screws. For vibration resistance, they have a thread locker bonded to the threads.

Stainless Steel Thread-Locking Hex Head Screws

Made from 18-8 stainless steel, these screws have good chemical resistance. They have a thread locker to prevent loosening from vibration.

Vibration-Resistant Flat Head Screws

Alloy Steel Thread-Locking
Hex Drive Flat Head Screws

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

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Metric Phillips Thread-Locking Flat Head Screws

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

Phillips Thread-Locking Flat Head Screws

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

Shoulder Screws

Alloy Steel Thread-Locking Shoulder Screws

A locking element on the threads adds friction to resist loosening. Comparable to Grade 8 steel, these alloy steel shoulder screws are the strongest we offer.

Metric Alloy Steel Thread-Locking Shoulder Screws

Available in metric sizes, these screws have a locking element on the threads that adds friction to resist loosening. Comparable to Grade 8 steel, they are the strongest screws we offer.

18-8 Stainless Steel
Thread-Locking Shoulder Screws

These shoulder screws have good chemical resistance.

Super-Corrosion-Resistant 316 Stainless
Steel Thread-Locking Shoulder Screws

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

Metric Thread-Locking Precision Shoulder Screws

Thread-Locking Precision Shoulder Screws

Slotted Thread-Locking Precision Shoulder Screws

Set Screws

Alloy Steel Thread-Locking Cup-Point Set Screws

These alloy steel set screws have a thin edge that digs into hard surfaces for a secure hold. A nylon locking element grips threads to resist loosening.

Metric Alloy Steel Thread-Locking
Cup-Point Set Screws

Made from alloy steel, these metric set screws have a thin edge that digs into hard surfaces for a secure hold. They have a nylon locking patch that grips threads to resist loosening.

Metric 18-8 Stainless Steel
Thread-Locking Cup-Point Set Screws

Made from 18-8 stainless steel, these metric set screws are chemical resistant. They have a nylon locking patch that grips threads to resist loosening.

18-8 Stainless Steel Thread-Locking
Cup-Point Set Screws

These 18-8 stainless steel set screws are chemical resistant. They have a nylon locking patch that grips threads to resist loosening.

Super-Corrosion-Resistant 316 Stainless
Steel Thread-Locking Cup-Point Set Screws

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

Thread-Locking Flat-Tip Set Screws

A nylon locking patch grips threads to resist loosening.

Thread-Locking Extended-Tip Set Screws

A nylon locking patch grips threads to resist loosening.

Thread-Locking Male-Female Threaded Hex Standoffs

Thread-Locking Male-Female
Threaded Hex Standoffs

A nylon patch bonded to the threads adds friction, preventing these standoffs from loosening from vibration.

Ball-Nose Spring Plungers

Slotted Ball-Nose Spring Plungers

Install these spring plungers with a screwdriver—they're slotted on one or both ends.

Hex-Drive Ball-Nose Spring Plungers

Install with a hex key for more torque than slotted ball-nose spring plungers.

Long-Nose Spring Plungers

Hex-Drive Long-Nose Spring Plungers

Install with a hex key for more torque than slotted long-nose spring plungers.

Long-Nose Spring Plungers

Install with a driver.

Slotted Long-Nose Spring Plungers

Slotted on both ends for installation with a screwdriver.

Long Hex-Nose Spring Plungers

Fasten from the nose end with a wrench for more torque than slotted long-nose spring plungers.

Extra-Long Hex-Nose Spring Plungers

These spring plungers have a nose that is about three-times longer than standard long hex-nose spring plungers.

Retractable Spring Plungers

Twist-to-Lock Knob-Style
Retractable Spring Plungers

Lock the nose into the retracted position by pulling the knob and rotating it 90°.

Knob-Style Retractable Spring Plungers

Retract the nose by pulling the knob.

Pull-Ring Retractable Spring Plungers

The ring allows you to attach these spring plungers to a lanyard.

Twist-to-Lock Pull-Ring Retractable Spring Plungers

Lock the nose into the retracted position by pulling the ring and rotating it 90°.

Pull-Ring Retractable Spring Plungers with Lanyard

Use the lanyard as a tether to secure the spring plunger to machinery and prevent accidental drops.

Twist-to-Lock L-Handle Retractable Spring Plungers

Lock the nose into the retracted position by pulling the handle and rotating it 90°.

L-Handle Retractable Spring Plungers

T-Handle Retractable Spring Plungers

Add-a-Knob Retractable Spring Plungers

Thread onto machinery or attach a knob or handle to the threaded spindle.

Low-Profile Knob-Style Retractable
Spring Plungers with Hex Drive

Install by hand or with a hex key in low-clearance applications.

Socket Head Screws

18-8 Stainless Steel Thread-LockingSocket Head Screws

Super-Corrosion-Resistant 316 StainlessSteel Thread-Locking Socket Head Screws

Alloy Steel Thread-Locking Socket Head Screws

Vibration-Resistant Sealing Socket Head Screws

Rounded Head Screws

Thread-Locking Pan Head Phillips Screws

Metric Thread-Locking Pan Head Phillips Screws

Stainless Steel Thread-LockingButton Head Hex Drive Screws

Metric Stainless Steel Thread-LockingButton Head Hex Drive Screws

Alloy Steel Thread-LockingButton Head Hex Drive Screws

Vibration-Resistant Sealing Rounded Head Screws

Thread-Locking Hex Head Screws

High-Strength Grade 8 SteelThread-Locking Hex Head Screws

Medium-Strength Metric Class 8.8 SteelThread-Locking Hex Head Screws

Stainless Steel Thread-Locking Hex Head Screws

Vibration-Resistant Flat Head Screws

Alloy Steel Thread-LockingHex Drive Flat Head Screws

Stainless Steel Thread-LockingHex Drive Flat Head Screws

Metric Phillips Thread-Locking Flat Head Screws

Phillips Thread-Locking Flat Head Screws

Shoulder Screws

Alloy Steel Thread-Locking Shoulder Screws

Metric Alloy Steel Thread-Locking Shoulder Screws

18-8 Stainless SteelThread-Locking Shoulder Screws

Super-Corrosion-Resistant 316 StainlessSteel Thread-Locking Shoulder Screws

Metric Thread-Locking Precision Shoulder Screws

Thread-Locking Precision Shoulder Screws

Slotted Thread-Locking Precision Shoulder Screws

Set Screws

Alloy Steel Thread-Locking Cup-Point Set Screws

Metric Alloy Steel Thread-LockingCup-Point Set Screws

Metric 18-8 Stainless SteelThread-Locking Cup-Point Set Screws

18-8 Stainless Steel Thread-LockingCup-Point Set Screws

Super-Corrosion-Resistant 316 StainlessSteel Thread-Locking Cup-Point Set Screws

Thread-Locking Flat-Tip Set Screws

Thread-Locking Extended-Tip Set Screws

Thread-Locking Male-Female Threaded Hex Standoffs

Thread-Locking Male-FemaleThreaded Hex Standoffs

Ball-Nose Spring Plungers

Slotted Ball-Nose Spring Plungers

Hex-Drive Ball-Nose Spring Plungers

Long-Nose Spring Plungers

Hex-Drive Long-Nose Spring Plungers

Long-Nose Spring Plungers

Slotted Long-Nose Spring Plungers

Long Hex-Nose Spring Plungers

Extra-Long Hex-Nose Spring Plungers

Retractable Spring Plungers

Twist-to-Lock Knob-StyleRetractable Spring Plungers

Knob-Style Retractable Spring Plungers

Pull-Ring Retractable Spring Plungers

Twist-to-Lock Pull-Ring Retractable Spring Plungers

Pull-Ring Retractable Spring Plungers with Lanyard

Twist-to-Lock L-Handle Retractable Spring Plungers

L-Handle Retractable Spring Plungers

T-Handle Retractable Spring Plungers

Add-a-Knob Retractable Spring Plungers

Low-Profile Knob-Style RetractableSpring Plungers with Hex Drive

18-8 Stainless Steel Thread-Locking
Socket Head Screws

Super-Corrosion-Resistant 316 Stainless
Steel Thread-Locking Socket Head Screws

Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Metric Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Alloy Steel Thread-Locking
Button Head Hex Drive Screws

High-Strength Grade 8 Steel
Thread-Locking Hex Head Screws

Medium-Strength Metric Class 8.8 Steel
Thread-Locking Hex Head Screws

Alloy Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

18-8 Stainless Steel
Thread-Locking Shoulder Screws

Super-Corrosion-Resistant 316 Stainless
Steel Thread-Locking Shoulder Screws

Metric Alloy Steel Thread-Locking
Cup-Point Set Screws

Metric 18-8 Stainless Steel
Thread-Locking Cup-Point Set Screws

18-8 Stainless Steel Thread-Locking
Cup-Point Set Screws

Super-Corrosion-Resistant 316 Stainless
Steel Thread-Locking Cup-Point Set Screws

Thread-Locking Male-Female
Threaded Hex Standoffs

Twist-to-Lock Knob-Style
Retractable Spring Plungers

Low-Profile Knob-Style Retractable
Spring Plungers with Hex Drive