A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5990-00-861-7986
NSN 6110-01-066-8038
NSN 6130-01-502-6729
NSN 6130-01-461-7765
NSN 6220-01-076-4383
NSN 5996-01-400-3558
NSN 6135-00-152-8729
NSN 7035-01-204-9851
NSN 6685-00-291-4050
NSN 5985-00-512-9187
NSN 5960-01-331-3817
NSN 6320-00-682-3448