Mating Locating Pins | McMaster-Carr

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.

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.

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.

Measuring and Inspecting

Pipe Flange Aligners with Protractor

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

Pipe Flange Alignment Kits

Align flanges on heavy pipes when alignment pins don't fit through the flange holes. Often used for pipefitting, welding, and maintenance, these kits make it possible to correct angular and offset misalignment on a range of pipe sizes.

Pipe Flange Aligner Pins with Horizontal Level

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

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.

Magnetic Pipe Flange Aligners with Level

Ensure an even seal around your flange—these tools align and level flanges in a single step.

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.

Magnetic Pipe Flange Aligner Pins

Swiftly and accurately align pipe flange bolt holes without the hassle of threads.

Threaded Hole Location Gauges

Find the true center of threaded holes to precisely align and measure parts.