A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-560-4811
NSN 2925-00-059-7991
NSN 5835-01-258-5597
NSN 5960-01-148-5859
NSN 5905-01-099-9496
NSN 5999-01-450-0541
NSN 5910-00-252-4853
NSN 5945-01-298-9525
NSN 6610-01-047-7245
NSN 6685-00-387-9654
NSN 2925-01-448-2880
NSN 6220-00-226-1994