3/8"-16 x 9/16"-12 Metal Coarse Thread Inserts (4 pcs.)

Diameter: 3/8"
Diameter 2: 9/16"
Material: Metal
Thread Size: 16 (Coarse)
Type: Thread Insert

Box of 4.

A thread insert is inserted into an object to add a threaded hole. They are used for repairing a stripped threaded hole, providing a more durable threaded hole in softer materials, and molding or casting threads into a workpiece, eliminating an operation.