Pilot Pins | McMaster-Carr

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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.

Captive Fastening Pins for Soft Materials

The grooves in these pins grip plastics and other soft materials. Press them in to hold panels together. Also known as PEM® TKA and TK4 TackSert pins.

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.

Locating Pins

Install these pins in a plate or table and mate with holes in a workpiece for precise alignment.

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.

Shoulder-Style Locating Pins

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

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.

Cast-In Locating Pins for Plastics

Encase these pins while molding plastic or composite parts. Once set, the knurls resist movement, letting you align the workpiece with precision on a plate or table.

Locating Pin Retractors

Use the handle on these retractors to extend and retract a locating pin, protecting the pin from damage in applications where fixtures move through a process, such as along a conveyor belt.

Air-Powered Locating Pin Retractors

A good choice for automated clamping, these retractors use compressed air to extend and retract a locating pin, protecting the pin from damage in applications where fixtures move through a process, such as along a conveyor belt.

Floating Locating Pins

The head on these pins slides side-to-side in one direction. Use one of these pins and one standard round-head pin to prevent jamming when loading and unloading workpieces with inconsistent hole spacing.

Spring-Loaded Guide Pins

Create-Your-Own Spring-Loaded Guide Pins

Thread in a screw, handle, or other part to create the right size and shape guide pin for your application.

Sealed Spring-Loaded Guide Pins

Sealed at the top to prevent debris from getting inside and making them seize up, these guide pins are a good choice for machining fixtures.

Spring-Loaded Guide Pins

As the workpiece pushes against the pin head in one direction, the internal spring pushes back to hold it in place for clamping.

Threaded Spring-Loaded Guide Pins

Threading makes these guide pins easier to remove and replace than press fit, so they're useful for high-wear applications.