A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-01-506-9610
NSN 6645-01-441-4456
NSN 7035-00-312-3055
NSN 5960-01-461-1384
NSN 7035-01-633-9537
NSN 6610-01-507-9476
NSN 6645-01-470-7246
NSN 6650-00-740-7338
NSN 6110-00-525-3418
NSN 6320-00-564-2772
NSN 5985-01-160-8227
NSN 5985-01-301-2354