A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-00-698-9853
NSN 6610-00-751-7916
NSN 5990-01-265-8082
NSN 6110-00-557-8315
NSN 6610-01-238-8712
NSN 5910-00-019-7536
NSN 5950-01-400-5942
NSN 5996-01-202-8127
NSN 6135-00-377-9165
NSN 5895-01-542-3570
NSN 5985-00-519-0757
NSN 5835-01-550-5094