A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-00-345-6237
NSN 6645-01-169-9054
NSN 5999-01-607-0289
NSN 5950-01-334-6230
NSN 6610-01-201-7943
NSN 5920-01-401-5315
NSN 5950-01-477-6699
NSN 5935-01-295-3383
NSN 5930-01-398-0018
NSN 5915-01-188-8314
NSN 6645-01-136-0562
NSN 6320-01-498-4954