A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-463-6559
NSN 6145-01-479-5578
NSN 5895-01-098-5944
NSN 6145-01-580-0334
NSN 5985-00-647-4998
NSN 7035-01-199-6915
NSN 5965-01-417-9185
NSN 5925-01-559-1427
NSN 6110-01-116-2353
NSN 5935-01-359-1945
NSN 6150-01-352-5803
NSN 5855-01-079-8716