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 6220-01-038-5057
NSN 6645-01-603-1004
NSN 6685-00-299-8496
NSN 5915-01-425-2007
NSN 5895-01-233-4566
NSN 5996-00-058-1907
NSN 6645-01-475-4723
NSN 5895-00-878-9404
NSN 5905-01-075-6258
NSN 6145-01-463-3281
NSN 6610-01-160-6585
NSN 5835-00-594-4921