A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-449-1846
NSN 5950-01-464-8089
NSN 7035-01-545-4409
NSN 5835-01-436-1797
NSN 6145-00-003-9527
NSN 5925-00-297-8821
NSN 5835-01-325-5677
NSN 5895-01-115-3955
NSN 6610-00-961-7263
NSN 5855-01-052-4956
NSN 5965-00-246-5612
NSN 4140-00-138-8966