McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Diameter Diameter

	Length Length

	Material Material

	Finish Finish

Zinc Plated

Zinc Yellow-Chromate Plated

Powder Coated

Cadmium Yellow-Chromate
Plated

	Usable Length Usable Length

	End Type End Type


Wire Retainer	Button

Locking Retainer	Plain

	Retainer Shape Retainer Shape

Squared

Rounded

	Cotter Pin Type Cotter Pin Type


Linch	Hairpin

Wire Snap	Hairpin for Retaining Grooves

Ring	Locking

Bow Tie	Standard

Hammer Set	Wedge Lock

	Retainer Closure Retainer Closure

Loop

Hook

Loop with Easy-Release Tab

	Pin Type Pin Type


Clevis	Cotter

For Tubing	Captive

	Wire Diameter Wire Diameter

	Retainer Clearance Retainer Clearance

	For Clevis Pin Diameter For Clevis Pin Diameter

1/16"-1/8"

7/64"-9/64"

1/8"-3/16"

3/16"-1/4"

1/4"

1/4"-5/16"

1/4"-3/8"

1/4"-1/2"

5/16"

5/16"-3/8"

5/16"-1/2"

3/8"

3/8"-7/16"

3/8"-1/2"

3/8"-5/8"

7/16"

7/16"-1/2"

7/16"-3/4"

1/2"

1/2"-5/8"

1/2"-3/4"

1/2"-7/8"

5/8"

5/8"-3/4"

5/8"-7/8"

5/8"-1"

3/4"

3/4"-1 1/16"

3/4"-1 1/8"

7/8"

7/8"-1"

1"-1 9/16"

1 1/8"-1 1/2"

1 1/4"-1 1/2"

9-14mm

10-16mm

16-20mm

20-28mm

28-40mm

28-45mm

30-45mm

	Head Type Head Type


Flat	Plain

	Minimum Hardness Minimum Hardness

	Passivation Passivation

Not Passivated

Passivated

	Eye Diameter Eye Diameter

	Button Style Button Style

Single

Double

	Button Diameter Button Diameter

1/4"

5/16"

3/8"

	Specifications Met Specifications Met

ASME

DIN

ISO

Mil. Spec.

SAE

	Leg Style Leg Style

Straight

Dog

	Button Height Button Height

1/4"

3/8"

7/16"

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1,038 Products

Clevis Pins

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.

Button Pins for Telescoping Tubing

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

Wire-Lock Pins for
Telescoping Tubing

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

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.

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.

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.

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.

Split Rings

Also known as key rings, twist these rings into place to secure clevis pins, connect components, or add a pull handle. They don't have the sharp ends of other cotter pins.

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.

Cotter Rings

Twist these rings on to lock pins in place. They don't have the sharp ends of other cotter 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.

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.

Captive Fastening Pins

Often used in cell phones and laptops, these pins attach thin panels such as printed circuit boards to metal and plastic bases. Also known as PEM® TA and T4 TackPins.

Fastener Assortments

Split Ring Assortments

Hairpin Clip Assortments

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

Cotter Pin Assortments

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

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Clevis Pins

Wire-Lock Clevis Pins

Button Pins for Telescoping Tubing

Wire-Lock Pins forTelescoping Tubing

Heavy Duty Locking Clevis Pins

Cotter Pins

Linch Pins

Hairpin Cotter Pins

Strong-Hold Hairpin Cotter Pins

Strong-Hold Wire-Snap Cotter Pins

Wire Snap Cotter Pins

Hairpin Clips

Locking Cotter Pins

Split Rings

Bow Tie Cotter Pins

Cotter Rings

Cotter Pins

Hammer-Set Cotter Pins

Wedge-Lock Cotter Pins

Captive Fastening Pins

Captive Fastening Pins

Fastener Assortments

Split Ring Assortments

Hairpin Clip Assortments

Cotter Pin Assortments

Wire-Lock Pins for
Telescoping Tubing