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 6105-01-343-7615
NSN 5998-00-234-8813
NSN 6150-01-579-0263
NSN 5925-01-239-3904
NSN 5920-00-448-3139
NSN 5920-01-027-9995
NSN 5835-00-523-0736
NSN 5950-01-431-9818
NSN 6650-01-364-8504
NSN 6650-00-784-9222
NSN 5990-00-765-1264
NSN 5960-01-212-8118