No. 7 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 6105-00-020-3591
NSN 5930-01-090-0223
NSN 6150-00-003-0751
NSN 6610-01-384-7949
NSN 6130-01-649-4462
NSN 5920-01-088-7958
NSN 6130-01-633-7792
NSN 5985-00-148-8233
NSN 5998-00-450-2565
NSN 6240-01-133-1723
NSN 6145-01-319-2182
NSN 6620-01-254-7963