A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5950-01-474-6584
NSN 5999-01-435-5209
NSN 6685-00-836-4056
NSN 6135-01-568-9107
NSN 5985-01-620-8980
NSN 6685-01-107-4571
NSN 5895-00-420-7042
NSN 6645-01-370-7380
NSN 6150-01-217-1509
NSN 5915-01-362-0665
NSN 6110-01-231-8683
NSN 5965-01-454-7313