Pin Retainers | McMaster-Carr

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REACH Compliant

	Shaft Type Shaft Type


Plain	Expanding Diameter

	Ring OD Ring OD

	For Groove Width For Groove Width

	Cotter Pin Type Cotter Pin Type


Linch	Hairpin

Standard	Hairpin for Retaining Grooves

Wire Snap	Locking

Bow Tie	Hammer Set

Wedge Lock

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7,672 Products

Clevis Pins

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

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.

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.

Loop-Grip Clevis Pins

A large loop handle makes these pins easy to grip.

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.

Ring-Grip Clevis Pins

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

Headless Clevis Pins

Install or remove these pins from either side.

T-Handle Clevis Pins

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

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.

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.

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

These one-piece fasteners lock in place with a toggle. Flip the toggle to release the 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.

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.

Wire-Lock Pins for Telescoping Tubing

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

Pins for Telescoping Tubing

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

Button Pins for Telescoping Tubing

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

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

Linch Pins

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

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.

Hairpin Clips

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

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.

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.

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.

Ball-Grip Quick-Release Pins

A smooth ball handle is easy to grip and won't catch on other 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.

Add-a-Handle Quick-Release Pins

Add a knob or handle to the threaded shank. A spring-loaded, nonlocking retaining ball pops out when the pin is pushed through a hole, and retracts when the pin is pulled out.

Knob-Grip Quick-Release Pins

A high-profile knob is easy to grip, but fits in small spaces. A spring-loaded, nonlocking retaining ball pops out when the pin is pushed through a hole, and retracts when the pin is pulled out.

T-Handle Quick-Release Pins

A T-handle makes these pins easy to grip. A spring-loaded, nonlocking retaining ball pops out when the pin is pushed through a hole, and retracts when the pin is pulled out.

Strong-Hold Quick-Release Pins

Two spring-loaded balls give these pins more holding power than quick-release pins with only one retaining ball. The balls pop out when the pin is pushed into a hole, and retract 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.

Locking Quick-Release Pins

Knob-Grip Locking Quick-Release Pins

The extra height and smaller width of the grip make the button more accessible in tight spaces. For a more secure hold than standard quick-release pins, these pins lock in place until you push the button to release the spring-loaded retaining balls.

T-Handle Locking Quick-Release Pins

For a more secure hold than standard quick-release pins, these pins lock in place until you push the button to release the spring-loaded retaining balls.

Choose-a-Color T-Handle Locking Quick-Release Pins

Use these pins for visibility or to color-code processes. For a more secure hold than standard quick-release pins, they lock in place until you push the button to release the spring-loaded retaining balls.

L-Handle Locking Quick-Release Pins

When there isn't enough room for a T-handle, an L-handle saves space but is still easy to grip. For a more secure hold than standard quick-release pins, these pins lock in place until you push the button to release the spring-loaded retaining balls.

Narrow-Grip Locking Quick-Release Pins

For the tightest spaces, these narrow-grip pins have the smallest heads of any of our locking quick-release pins. They lock in place until you push the button to release the spring-loaded retaining balls.

Knob-Grip Super-Corrosion-Resistant
Locking Quick-Release Pins

The extra height and smaller width of the grip make the button more accessible in tight spaces. Made entirely of stainless steel, they stand up to corrosive enviroments. Pins lock in place until you push the button to release the spring-loaded retaining balls.

Recessed-Button Super-Corrosion-Resistant
Locking Quick-Release Pins

A recessed button prevents accidental pin removal. These all-stainless steel pins stand up to corrosive environments. They lock in place until you push the button to release the spring-loaded retaining balls.

Strong-Hold Super-Corrosion-Resistant
Locking Quick-Release Pins

Four spring-loaded retaining balls provide extra holding power. Made entirely of stainless steel, these pins stand up to corrosive enviroments. They lock in place until you push the button to release the spring-loaded retaining balls.

T-Handle Super-Corrosion-Resistant
Locking Quick-Release Pins

A T-handle makes these pins easy to grip. Made entirely of stainless steel, they stand up to corrosive enviroments. Pins lock in place until you push the button to release the spring-loaded retaining balls.

Clamp-Action Locking Quick-Release Pins

The shaft on these pins retracts into the head to hold thin sheets of material together. Pins lock in place until you push the button to release the spring-loaded retaining balls.

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.

Ring-Grip Locking Push-Pull Quick-Release Pins

Also known as double-acting pins, these pins lock in place until you push the button or pull the ring to release the spring-loaded retaining balls. The smooth ring handle won't catch on parts.

T-Handle Locking Push-Pull Quick-Release Pins

Also known as double-acting pins, these pins lock in place until you push or pull the handle to release the spring-loaded retaining balls. The T-handle is easy to grip.

Ball-and-Cotter Double-Locking Quick-Release Pins

These pins lock in place until you push the button to release the spring-loaded retaining balls, and can also be secured with a cotter pin for longer-term holding. Two-step locking prevents accidental removal.

Cam-Lever Double-Locking Quick-Release Pins

To insert and remove these pins, press the button, then flip the lever to release the spring-loaded retaining balls. Two-step locking prevents accidental removal.

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.

Quick-Release Pins for Access Panels

Attach these pins to a machine cover or access panel, then clip them in to receptacles installed in the enclosure for quick access. Pins lock in place until you release them.

Expanding Diameter Quick-Release Pins

Flip the handle 180° to expand and contract the shaft for a tight, vibration-resistant fit.

Magnetic Quick-Release Pins

A strong magnet in the head holds these pins in place on steel and other ferrous metals. Use them for light duty applications and blind holes.

External Retaining Rings

Push-On External Retaining Rings

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

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.

Flanged Push-On External Retaining Rings

The wide flange provides better load distribution than standard external push rings and can be used to cover oversized holes. Also known as thread cutting nuts.

Side-Mount External Retaining Rings

Also known as E-style 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.

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.

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.

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.

External Retaining Rings

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

Heavy Duty External Retaining Rings

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

Mil. Spec. External Retaining Rings

These rings meet military specification MS 16624.

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.

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.

Spiral External Retaining Rings

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

Low-Clearance External Retaining Rings

Also known as constant-section rings, these rings have open ends and a profile that does not taper like other external retaining rings. Use them with linear bearings on support rail shafts.

Speared Ends External Retaining Rings

Often used with small engines, heavy equipment, and power transmission, these external retaining rings have speared ends to help you install and remove them.

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.

Internal Retaining Rings

Push-On Internal Retaining Rings

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

Bowed Internal Retaining Rings

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

Heavy-Duty Internal Retaining Rings

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

Single-Turn Spiral Internal Retaining Rings

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

Internal Teeth Retaining Rings

With teeth along the inside, these retaining rings hold chamfered shafts inside the housing of your equipment.

Internal Retaining Rings

Squeeze these rings to place them in the groove inside a bore or housing.

Inverted Internal Retaining Rings

For a smooth bore and better clearance than standard internal retaining rings, the lugs on these rings face outward.

Heavy Duty Spiral Internal Retaining Rings

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

Spiral Internal Retaining Rings

These coiled rings can be wound into place inside a bore or housing without tools.

Retaining Ring Assortments

External and Side-Mount Retaining Ring Assortments

Assortments include pliers to install external rings.

External, Internal, and Side-Mount
Retaining Ring Assortments

These 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 Internal Spiral Retaining Ring Assortments

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

External and Internal Retaining Ring Assortments

Assortments include pliers to install external and internal 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.

Internal Retaining Ring Assortments

Pull ring ends together with retaining ring pliers and place into the bore of a shaft or housing.

Push Ring Assortments

External Push Ring Assortments

Internal Push Ring Assortments

Pin 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.

Clevis Pins

Clevis Pins

Precision Clevis Pins

Adjustable Clevis Pins

Loop-Grip Clevis Pins

Bent-Pull Clevis Pins

Adjustable Bent-Pull Clevis Pins

Ring-Grip Clevis Pins

Headless Clevis Pins

T-Handle Clevis Pins

Clevis Pins with Retaining Ring Groove

Headless Clevis Pins with Retaining Ring Grooves

Wire-Lock Clevis Pins

Clamping Toggle-Lock Clevis Pins

Toggle-Lock Clevis Pins

Toggle-Lock Clevis Pins with Handle

Self-Locking Clevis Pins

Wire-Lock Pins for Telescoping Tubing

Pins for Telescoping Tubing

Button Pins for Telescoping Tubing

Heavy Duty Locking Clevis Pins

Padlockable Clevis Pins

Cotter Pins

Linch Pins

Hairpin Cotter Pins

Strong-Hold Hairpin Cotter Pins

Cotter Pins

Hairpin Clips

Strong-Hold Wire-Snap Cotter Pins

Wire Snap Cotter Pins

Locking Cotter Pins

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

Ball-Grip Quick-Release Pins

Add-a-Handle Quick-Release Pins

Knob-Grip Quick-Release Pins

T-Handle Quick-Release Pins

Strong-Hold Quick-Release Pins

Ring-Grip Shoulder-Style Quick-Release Pins

T-Handle Shoulder-Style Quick-Release Pins

Locking Quick-Release Pins

Knob-Grip Locking Quick-Release Pins

T-Handle Locking Quick-Release Pins

Choose-a-Color T-Handle Locking Quick-Release Pins

L-Handle Locking Quick-Release Pins

Narrow-Grip Locking Quick-Release Pins

Knob-Grip Super-Corrosion-ResistantLocking Quick-Release Pins

Recessed-Button Super-Corrosion-ResistantLocking Quick-Release Pins

Strong-Hold Super-Corrosion-ResistantLocking Quick-Release Pins

T-Handle Super-Corrosion-ResistantLocking Quick-Release Pins

Clamp-Action Locking Quick-Release Pins

Adjustable-Length Locking Quick-Release Pins

Ring-Grip Locking Push-Pull Quick-Release Pins

T-Handle Locking Push-Pull Quick-Release Pins

Ball-and-Cotter Double-Locking Quick-Release Pins

Cam-Lever Double-Locking Quick-Release Pins

Keyed Double-Locking Quick-Release Pins

Quick-Release Pins for Access Panels

Expanding Diameter Quick-Release Pins

Expanding Diameter Quick-Release Pins

Magnetic Quick-Release Pins

Magnetic Quick-Release Pins

External Retaining Rings

Push-On External Retaining Rings

Rectangular Push-On External Retaining Rings

Flanged Push-On External Retaining Rings

Side-Mount External Retaining Rings

Heavy Duty Side-Mount External Retaining Rings

Low-Clearance Side-Mount External Retaining Rings

Wide-Grip Side-Mount External Retaining Rings

Bowed Side-Mount External Retaining Rings

Clip-On External Retaining Rings

External Retaining Rings

Heavy Duty External Retaining Rings

Mil. Spec. External Retaining Rings

Knob-Grip Super-Corrosion-Resistant
Locking Quick-Release Pins

Recessed-Button Super-Corrosion-Resistant
Locking Quick-Release Pins

Strong-Hold Super-Corrosion-Resistant
Locking Quick-Release Pins

T-Handle Super-Corrosion-Resistant
Locking Quick-Release Pins

External, Internal, and Side-Mount
Retaining Ring Assortments