A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5910-01-025-6738
NSN 6320-01-564-0893
NSN 5965-01-614-0029
NSN 5930-01-446-1264
NSN 6685-01-202-7823
NSN 5915-01-300-9697
NSN 5996-01-062-0807
NSN 7035-00-565-9623
NSN 6645-00-252-5798
NSN 5965-01-094-6602
NSN 2925-00-436-9837
NSN 6150-00-259-4632