Socket Shoulder bolts are fasteners that have an unthreaded portion of the shank that functions as a bearing surface or spacer.
These are measured by the Shoulder Only, for this size the shoulder diameter is 5/16", the length of the shoulder is 2" and the thread on the end is 1/4 20 TPI UNC.
It is important to note the threaded portion is NOT included in the length.
They have an in-hex drive and are fastened using a hexagonal wrench also known as an Allen key. Use Allen key size = 5/32"
Thread pitch = 1/4- 20 TPI
