No. 12 spline size
An item having an internal drive at one end made to fit into the external drive end of a socket wrench handle, torque wrench, or power driven tool. The opposite end consists of various internal wrench shapes such as hexagon or square. It may include an integral universal joint.
Classification: Socket wrenches with or without handles, drives and extensions, parts, base metal
NSN 5950-00-818-6956
NSN 5945-01-455-1364
NSN 6620-01-246-7133
NSN 2925-01-233-8545
NSN 5996-01-620-2442
NSN 6645-00-503-1379
NSN 5996-00-283-7385
NSN 5905-01-643-5660
NSN 6240-01-497-3085
NSN 5935-01-154-6112
NSN 5910-00-086-3940
NSN 6145-01-200-6377