A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 2925-01-068-3844
NSN 4140-00-268-9285
NSN 2925-01-159-0506
NSN 5835-01-023-8733
NSN 5835-01-589-4735
NSN 6135-01-092-4734
NSN 5910-01-377-2630
NSN 6220-01-160-7247
NSN 5945-00-936-7570
NSN 5895-00-102-7635
NSN 5999-00-916-3871
NSN 2925-01-019-1672