A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-043-7443
NSN 5855-01-369-5037
NSN 6685-01-027-1168
NSN 5935-01-483-0064
NSN 5920-01-530-6502
NSN 4140-01-307-2484
NSN 5920-01-292-0686
NSN 5950-00-004-6324
NSN 5935-01-209-3480
NSN 5945-00-890-4491
NSN 5910-00-004-7577
NSN 5960-00-553-7338