No. 16 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 6240-01-396-1809
NSN 5930-01-455-0312
NSN 4140-01-190-3280
NSN 5998-00-854-0880
NSN 5996-01-391-7489
NSN 5895-00-504-7700
NSN 6620-01-026-1776
NSN 5950-01-222-1021
NSN 5960-01-124-8336
NSN 5990-01-086-4825
NSN 5960-01-142-6981
NSN 5920-01-634-0250