Pin Retainers | McMaster-Carr

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REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Ring Thickness Ring Thickness

	Cotter Pin Type Cotter Pin Type


Hairpin	Linch

Standard	Locking

Hairpin for Retaining Grooves	Wire Snap

Bow Tie	Hammer Set

Wedge Lock

	For Groove Width For Groove Width

	Wire Diameter Wire Diameter

	Ring ID Ring ID

	Head Diameter Head Diameter

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5,074 Products

Clevis Pins

The low-profile head on these pins holds them in place on one side.

Adjustable Clevis Pins

Also known as universal clevis pins, these pins have holes on 1/4" centers so you can change the length by moving the cotter pin.

Precision Clevis Pins

These pins combine the locking capabilities of a clevis pin with the precision diameter of a dowel pin for a tight fit.

Bent-Pull Clevis Pins

The bend makes these pins easy to insert and pull out.

Adjustable Bent-Pull Clevis Pins

These pins have multiple through holes; change the length by moving the cotter pin. The bend makes them easy to insert and pull out.

Loop-Grip Clevis Pins

A large loop handle makes these pins easy to grip.

Headless Clevis Pins

Install or remove these pins from either side.

Ring-Grip Clevis Pins

Easier to install and remove than standard clevis pins, these pins have a ring-grip handle.

T-Handle Clevis Pins

A plastic-coated T-handle welded to these pins makes them easy to grab.

Wire-Lock Clevis Pins

The wire retainer snaps closed to secure the pin for a one-piece alternative to a clevis and cotter pin combination. Also known as PTO pins.

Clevis Pins with Retaining Ring Groove

Slide a retaining ring into the groove for a secure hold that takes up less space than a cotter pin.

Headless Clevis Pins with Retaining Ring Grooves

Install or remove these pins from either side. Slide a retaining ring into the groove for a secure hold that takes up less space than a cotter pin.

Toggle-Lock Clevis Pins with Handle

A swivel handle makes these pins easy to install and remove, while the toggle locks them in place. Flip the toggle to release the pin.

Clamping Toggle-Lock Clevis Pins

A spring holds these pins tight, while a toggle locks them in place. Flip the toggle to release the pin.

Toggle-Lock Clevis Pins

A swivel handle makes these pins easy to install and remove, while the toggle locks them in place. Flip the toggle to release the pin.

Wire-Lock Pins for Telescoping Tubing

Sized to fit snugly around pipe and tube, these pins use spring force to keep the retainer closed.

Button Pins for Telescoping Tubing

Spring force holds pieces of telescoping tubing together. Also known as snap buttons and tubing buttons.

Pins for Telescoping Tubing

Also known as gravity pins, these pins fit in holes on telescoping tubing to adjust the length.

Self-Locking Clevis Pins

For the fastest installation, push these pins into a hole and a spring-loaded wedge pops out to lock them in place. Also known as slic pins.

Heavy Duty Locking Clevis Pins

Often used to connect equipment to a drawbar in towing applications, these rugged pins have a welded solid steel retainer.

Padlockable Clevis Pins

Use a padlock to secure these pins. The bend makes them easy to insert and pull out.

Cotter Pins

Hairpin Cotter Pins

Also known as hitch pin clips and R-clips, these pins are easy to install and remove.

Strong-Hold Hairpin Cotter Pins

A coil makes a stronger grip than standard hairpin cotter pins to prevent accidental release.

Linch Pins

Slide the pin through a hole then snap the ring down to lock these pins in place. Also known as click pins.

Cotter Pins

Also known as split pins, these have one prong slightly longer than the other so they’re easy to open. Bend prongs outward to secure.

Locking Cotter Pins

An extra loop locks these cotter pins more securely than other pins, so they can't vibrate out or be knocked off.

Strong-Hold Wire-Snap Cotter Pins

These pins are coiled for more tension than standard wire-snap cotter pins.

Wire Snap Cotter Pins

Also known as safety pins, these are easy to install and remove. Tension keeps them closed.

Hairpin Clips

Clip these pins onto grooved shafts and clevis pins with retaining ring grooves.

Bow Tie Cotter Pins

The double-head design lets you push or pull these pins from either side of the hole. Once in place there's little chance they will be vibrated out or knocked off.

Hammer-Set Cotter Pins

For parts that spin or are otherwise difficult to access, slide these pins in and tap them with a hammer for a temporary hold. Reposition work, then bend the prongs outward to secure.

Wedge-Lock Cotter Pins

Slide these heavy duty pins into the through-hole in a clevis pin, then hit them with a hammer to wedge the prongs open.

Quick-Release Pins

Ring-Grip Quick-Release Pins

The smooth ring handle on these pins won't catch on parts. A spring-loaded, nonlocking retaining ball pops out when the pin is pushed through a hole, and retracts when the pin is pulled out.

Flat-Head Quick-Release Pins

These pins have a low-profile head, so they won't get knocked out of place. A spring-loaded, nonlocking retaining ball pops out when the pin is pushed through a hole, and retracts when the pin is pulled out.

Loop-Grip Quick-Release Pins

A bright-orange plastic-coated handle makes these pins easy to see and easy to grip. Pins have a spring-loaded ball that pops out when the pin is pushed into a hole, and retracts when the pin is pulled out.

Ring-Grip Shoulder-Style Quick-Release Pins

The smooth ring handle on these pins won't catch on parts. The shoulder keeps a portion of the pin outside the hole and makes them easy to grab.

T-Handle Shoulder-Style Quick-Release Pins

A T-handle makes these pins easy to grip. The shoulder keeps a portion of the pin outside the hole and makes them easy to grab.

Adjustable-Length Locking Quick-Release Pins

These pins adjust to take up play in a system or hold parts in holes of varying thicknesses. Spin the handle up or down, then tighten the locknut to change the length by up to ½”. Pins lock in place until you push the button to release the spring-loaded retaining balls.

Keyed Double-Locking Quick-Release Pins

Use the key to unlock these pins, then press the button to release the spring-loaded retaining balls. Two-step locking prevents accidental removal.

External Retaining Rings

Open these rings, pass them over the end of a shaft, and release to spring into the groove.

Mil. Spec. External Retaining Rings

These rings meet military specification MS 16624.

Heavy Duty External Retaining Rings

Thicker than standard external retaining rings, these rings withstand greater force.

Self-Locking External Retaining Rings

No groove is required for these rings—their thick profile helps them grip the shaft.

Bowed External Retaining Rings

The curved design of these rings works like a spring, taking up play for a tight hold.

Inverted External Retaining Rings

For a smooth profile and better clearance than standard external retaining rings, the lugs on these rings point inward.

Push-On External Retaining Rings

No groove required—press these rings onto the end of a shaft for a firm grip.

Push-On Retaining Caps

Use these caps to hold components in place and protect shaft ends.

Rectangular Push-On External Retaining Rings

Also known as flat-style speed nuts, these have a large surface to distribute loads better than standard and flanged external push rings.

Heavy Duty Side-Mount External Retaining Rings

These rings are reinforced to withstand faster rotation than other side‐mount retaining rings. Also known as reinforced E‐style rings.

Wide-Grip Side-Mount External Retaining Rings

Also known as poodle rings, these thick rings have "ears" that form a large retaining surface to withstand stronger forces than other side-mount retaining rings.

Side-Mount External Retaining Rings

Also known as E-style rings.

Low-Clearance Side-Mount External Retaining Rings

Also known as C-style and crescent rings, these rings have a small shoulder to fit in tight spaces.

Bowed Side-Mount External Retaining Rings

Also known as bowed E-style rings, these have a curved design that works like a spring, taking up play for a tight hold.

Clip-On External Retaining Rings

Slide these rings into a groove near the end of the shaft and the tab locks them in place.

Spiral External Retaining Rings

These coiled rings can be wound into place on a shaft without tools.

Heavy Duty Spiral External Retaining Rings

Thicker than standard spiral rings, these rings withstand greater forces.

Single-Turn Spiral External Retaining Rings

Slide these rings into place with one twist—no tools required—for applications with high thrust loads.

Crimp-On External Retaining Rings

Also known as X-washers, place these rings into the groove and squeeze tight with pliers to form a 360° closure.

Internal Retaining Rings

Single-Turn Spiral Internal Retaining Rings

Slide these rings into place by hand with a single twist for applications with high thrust loads.

Heavy-Duty Internal Retaining Rings

Thicker and stronger than standard internal retaining rings, these withstand greater thrust loads.

Push-On Internal Retaining Rings

No groove required—these rings have teeth that firmly grip the bore.

Fastener Assortments

Clevis Pin Assortments

Clevis pins have a hole for a cotter pin on one end to lock them in place.

Hairpin Clip Assortments

Clip these pins onto grooved shafts and clevis pins to keep components in place.

Hairpin Cotter Pin Assortments

Also known as hitch pin clips and R-clips, use these cotter pins in applications requiring quick installation and removal.

Cotter Pin Assortments

Also known as split pins, these have one prong slightly longer than the other so they’re easy to open.

External Push Ring Assortments

External and Internal Spiral Retaining Ring Assortments

Wind these retaining rings into a groove—no tools required for installation.

External, Internal, and Side-Mount
Retaining Ring Assortments

These assortments include pliers to install external and internal rings.

External and Internal Retaining Ring Assortments

Assortments include pliers to install external and internal rings.

External Retaining Ring Assortments

Pull these rings open with retaining ring pliers, pass over the end of a shaft, and release to spring into a groove.

External and Side-Mount Retaining Ring Assortments

Assortments include pliers to install external rings.

Side-Mount External Retaining Ring Assortments

Also known as E-Style and C-style rings, slide these into the groove from the side of the shaft. They provide a wider shoulder than other external retaining rings for a larger retaining surface.

Rectangular Push Nuts

Also known as flat-style speed nuts, these have large sides, so they're easy to push over threads by hand.

Rectangular Push Nuts for Tapping Screws

Tag Rings

Loop these rings onto tags.

Clevis Pins

Clevis Pins

Adjustable Clevis Pins

Precision Clevis Pins

Bent-Pull Clevis Pins

Adjustable Bent-Pull Clevis Pins

Loop-Grip Clevis Pins

Headless Clevis Pins

Ring-Grip Clevis Pins

T-Handle Clevis Pins

Wire-Lock Clevis Pins

Clevis Pins with Retaining Ring Groove

Headless Clevis Pins with Retaining Ring Grooves

Toggle-Lock Clevis Pins with Handle

Clamping Toggle-Lock Clevis Pins

Toggle-Lock Clevis Pins

Wire-Lock Pins for Telescoping Tubing

Button Pins for Telescoping Tubing

Pins for Telescoping Tubing

Self-Locking Clevis Pins

Heavy Duty Locking Clevis Pins

Padlockable Clevis Pins

Cotter Pins

Hairpin Cotter Pins

Strong-Hold Hairpin Cotter Pins

Linch Pins

Cotter Pins

Locking Cotter Pins

Strong-Hold Wire-Snap Cotter Pins

Wire Snap Cotter Pins

Hairpin Clips

Bow Tie Cotter Pins

Hammer-Set Cotter Pins

Wedge-Lock Cotter Pins

Quick-Release Pins

Ring-Grip Quick-Release Pins

Flat-Head Quick-Release Pins

Loop-Grip Quick-Release Pins

Ring-Grip Shoulder-Style Quick-Release Pins

T-Handle Shoulder-Style Quick-Release Pins

Adjustable-Length Locking Quick-Release Pins

Keyed Double-Locking Quick-Release Pins

External Retaining Rings

External Retaining Rings

Mil. Spec. External Retaining Rings

Heavy Duty External Retaining Rings

Self-Locking External Retaining Rings

Bowed External Retaining Rings

Inverted External Retaining Rings

Push-On External Retaining Rings

Push-On Retaining Caps

Rectangular Push-On External Retaining Rings

Heavy Duty Side-Mount External Retaining Rings

Wide-Grip Side-Mount External Retaining Rings

Side-Mount External Retaining Rings

Low-Clearance Side-Mount External Retaining Rings

Bowed Side-Mount External Retaining Rings

Clip-On External Retaining Rings

Spiral External Retaining Rings

Heavy Duty Spiral External Retaining Rings

Single-Turn Spiral External Retaining Rings

Crimp-On External Retaining Rings

Internal Retaining Rings

Single-Turn Spiral Internal Retaining Rings

Heavy-Duty Internal Retaining Rings

Push-On Internal Retaining Rings

Fastener Assortments

Clevis Pin Assortments

Hairpin Clip Assortments

Hairpin Cotter Pin Assortments

Cotter Pin Assortments

External Push Ring Assortments

External and Internal Spiral Retaining Ring Assortments

External, Internal, and Side-MountRetaining Ring Assortments

External and Internal Retaining Ring Assortments

External Retaining Ring Assortments

External and Side-Mount Retaining Ring Assortments

Side-Mount External Retaining Ring Assortments

Rectangular Push Nuts

Rectangular Push Nuts

External, Internal, and Side-Mount
Retaining Ring Assortments