No. 9 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 6610-01-075-8755
NSN 5999-01-294-4723
NSN 5910-01-294-5701
NSN 6135-00-112-8637
NSN 5999-01-439-4952
NSN 6105-00-161-8434
NSN 6610-01-101-4723
NSN 5855-01-537-3481
NSN 6650-01-184-9238
NSN 6650-00-140-8776
NSN 5985-01-607-0291
NSN 2925-01-204-6243