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 6240-01-328-0718
NSN 5930-01-323-6505
NSN 5925-00-823-2909
NSN 6240-01-039-0388
NSN 6135-01-463-2445
NSN 2925-01-328-4394
NSN 5930-01-495-0759
NSN 7035-01-052-3815
NSN 6620-01-557-0195
NSN 4140-01-417-6920
NSN 5835-01-200-7153
NSN 6220-01-398-1087