A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-445-3563
NSN 6130-01-530-6440
NSN 5985-01-416-9441
NSN 5998-01-656-6381
NSN 6110-01-425-1449
NSN 5960-01-480-5734
NSN 6220-01-438-8508
NSN 5945-00-475-8107
NSN 6610-01-442-3509
NSN 5975-00-142-2450
NSN 5835-01-286-6499
NSN 6110-01-182-6225