A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-00-585-5852
NSN 5985-01-415-1246
NSN 6150-01-625-3261
NSN 6650-01-449-3042
NSN 5935-01-616-4854
NSN 6685-00-394-8788
NSN 5920-01-075-7116
NSN 5985-01-118-4784
NSN 6650-01-548-7915
NSN 5905-00-452-2469
NSN 5915-00-525-5753
NSN 6145-01-170-6398