A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5985-00-225-9074
NSN 6150-01-543-2862
NSN 5985-00-378-0156
NSN 5965-01-529-8437
NSN 6220-01-421-6917
NSN 6240-00-435-0433
NSN 6650-00-021-9555
NSN 5935-00-348-6621
NSN 4140-01-376-0986
NSN 5998-01-334-9350
NSN 5920-01-659-1708
NSN 4140-01-054-8516