A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-495-8898
NSN 5935-01-053-8467
NSN 5905-00-707-5032
NSN 6650-01-209-2409
NSN 6220-01-078-7602
NSN 5985-01-182-0192
NSN 6110-00-257-5199
NSN 6645-00-464-6375
NSN 5855-01-280-9735
NSN 5905-00-214-7303
NSN 5920-01-415-5020
NSN 5996-00-012-8639