A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5985-01-526-9650
NSN 4140-01-124-5519
NSN 6645-01-418-1657
NSN 4140-00-165-6535
NSN 6110-01-577-9364
NSN 5915-01-338-0671
NSN 6645-01-304-4308
NSN 6610-01-152-2821
NSN 5945-00-952-3818
NSN 5930-01-347-5448
NSN 5905-01-445-7161
NSN 5999-01-474-6224