A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-00-782-0844
NSN 5930-01-084-1882
NSN 5965-00-263-6436
NSN 6150-01-112-6807
NSN 5985-01-438-7850
NSN 6240-00-056-8042
NSN 5935-00-541-6481
NSN 6150-01-487-4730
NSN 6240-01-573-7036
NSN 6685-00-402-2458
NSN 5910-01-217-4021
NSN 6150-01-363-8650