A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-00-067-7620
NSN 7035-01-444-4240
NSN 5915-01-410-7822
NSN 6645-01-651-9562
NSN 5960-00-106-4168
NSN 5910-01-024-8019
NSN 5910-01-299-6605
NSN 5950-01-446-6903
NSN 6105-01-438-0209
NSN 5895-00-791-5661
NSN 6220-01-017-5492
NSN 5965-01-608-5931