A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-01-586-4329
NSN 5915-00-659-3107
NSN 6130-01-116-2100
NSN 5965-01-128-4381
NSN 5930-01-344-7222
NSN 5905-01-400-0963
NSN 5905-01-043-1852
NSN 5985-00-597-2966
NSN 5990-01-094-6826
NSN 5998-00-727-8716
NSN 5910-00-077-1353
NSN 4140-01-181-9669