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 6220-00-242-7065
NSN 6645-01-364-0867
NSN 5905-01-287-4398
NSN 6240-01-526-7811
NSN 5996-00-100-4932
NSN 6620-01-026-0346
NSN 5985-00-165-1945
NSN 5855-01-003-7102
NSN 5925-00-731-7710
NSN 6150-01-272-0096
NSN 5999-01-152-1929
NSN 6240-01-432-5107