Flange Pins | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Head Height Head Height

	Finish Finish

Zinc Yellow-Chromate Plated

	Handle Material Handle Material

	For Maximum Cotter Pin Diameter For Maximum Cotter Pin Diameter

	Thread Size Thread Size

	Nose Material Nose Material

	Through Hole Diameter Through Hole Diameter

	Body Type Body Type


Threaded	Plate Mount

Press Fit

	Nose Diameter Nose Diameter

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3,473 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.

T-Handle Clevis Pins

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

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.

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.

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 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.

Toggle-Lock Clevis Pins

These one-piece fasteners lock in place with a toggle. 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 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.

Wire-Lock Pins for Telescoping Tubing

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

Mold Pins

Core Pins

These pins have a flat head to fit into a counterbored hole.

Flush-Mount Core Pins

A 60° beveled head fits into a countersunk hole.

Ejector Pins

Push parts out of molds with these hardened pins. Also known as knockout and forged pins.

Shoulder-Style Ejector Pins

A thick shoulder makes these pins more rigid than standard ejector pins.

Punch Pins

Use these pins with a die to punch 1/8" and larger holes. Pins can be modified to fit your application.

Captive Pins

Position, pivot, and align components. Also known as pilot pins and PEM® TP4, TPS, and MPP pins.

Weld-On Pins

Through-Hole Weld-On Pins

Pass these pins through a mounting hole and weld the head to the surface.

Surface-Mount Weld-On Pins

Weld these pins directly to a surface —no mounting hole required.

Quick-Release Pins

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Linch Pins

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

Spring Plungers

Press-Fit Captive-Panel Retractable Spring Plungers

Use an arbor press or similar pressure tool to install these spring plungers into a panel.

Twist-to-Lock Press-Fit Captive-Panel
Retractable Spring Plungers

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

Twist-to-Lock Plate-Mount Retractable Spring Plungers

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

Plate-Mount Retractable Spring Plungers

Two holes in the plate allow these plungers to be mounted to a flat surface.

Add-a-Knob Retractable Spring Plungers

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

Twist-to-Lock Knob-Style Retractable Spring Plungers

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

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

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

Sanitary Twist-to-Lock Knob-Style
Retractable Spring Plungers

Quickly align, join, or hold machine components in place in food, pharmaceutical, and other sanitary environments. Pulling the plunger knob and twisting it 90° will lock the nose into its retracted position.

Knob-Style Retractable Spring Plungers

Retract the nose by pulling the knob.

Press-Fit Long-Nose Spring Plungers

A flange keeps the plunger from being pushed through a hole when the ball is depressed.

Clevis Pin Assortments

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

Pipe Flange Aligners

Pipe Flange Aligner Pins

Insert a pair of these nut-and bolt pins into adjacent flange holes and tighten to align flanges before connecting two pipes.

Pipe Flange Aligners with Protractor

Line up two pipe flanges and determine pipe angle with the included nut-and bolt pins, level, and protractor.

Stepped Pipe Flange Aligner Pins

Each step on these aligner pins matches common bolt holes on pipe flanges, so they're more precise than conical aligner pins and don’t require nuts. Press the pair of pins into mated flanges to make sure the flanges are aligned.

Pipe Flange Aligner Pins with Horizontal Level

Ensure horizontal alignment of pipe flanges with a level rod that runs between two alignment pins.

Hole-Alignment Pins

No-Strike Hex Head Alignment Pin Sets

The tapered shaft of these pins eliminates the need for hammering and prying when aligning flange bolt holes.

No-Strike Hole-Alignment Pins for Flange Bolt Holes

Turn the pin and the tapered shaft forces the two holes into alignment.

Impact-Resistant Hole-Alignment Pins

Often called bull pins, these pins are designed to resist mushrooming caused by repeated pounding.

Locating Pins

Shoulder-Style Locating Pins

The shoulder provides a consistent height reference point and keeps the pin from being pressed through the fixture.

Mating Locating Pins and Hole Liners

Maintain consistent alignment in mating parts by installing a pin in one part and a liner in the other.

Threaded Locating Pins

Screw the shank into a threaded hole for quick installation and removal.

Removable Locating Pins

A slightly undersized shank makes these pins easy to install and replace. Also known as slip-fit and lock-screw locating pins, they are held in place by a separate lock screw.