A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-485-3429
NSN 6220-00-197-0172
NSN 5920-01-077-1756
NSN 6135-01-384-7155
NSN 5990-01-605-4769
NSN 5915-01-366-9520
NSN 6320-00-857-4073
NSN 5905-01-429-4227
NSN 5985-01-012-5970
NSN 6220-01-531-5064
NSN 5990-01-387-3820
NSN 5905-01-206-4012