MIDWEST FASTENER CORP 36701 5/16" x 2" Tube Linch Pins 4PK

5/16" Tube Linch Pins 4PK

The MIDWEST FASTENER 36701 pack supplies four 5/16-inch diameter linch pins for securing shafts or clevis pins on trailers, farm implements and general equipment. Each pin measures three inches in overall length and includes a formed wire loop that locks the fastener in place without tools. The zinc-plated finish resists corrosion during outdoor storage and use. This hardware suits maintenance crews and DIY owners who need quick, repeatable fastening.

Simple hand installation

Push the pin through the aligned holes until the wire loop snaps over the shaft end; no hammer or pliers are required for normal fitment. If the hole is undersized or deformed by wear, the pin will not seat fully and the loop cannot engage, creating a false sense of security. Dirt or rust inside the hole can also prevent the loop from closing completely, so clean the bore before inserting the pin. Always verify the loop is fully seated before putting the joint under load.

Mechanical shear limits

The pin transmits load through its 5/16-inch cross-section, so the joint strength is limited by the shear capacity of that diameter in the base metal used. Excessive side load or repeated shock can bend the pin body, making removal difficult and reducing the effective shear area. The wire loop is not designed for lifting or tensile loading; applying pull-out force may straighten the loop and release the pin. Users must match the pin diameter to the hole size and grade the assembly for the expected force.