A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-00-975-4007
NSN 5996-01-088-8715
NSN 7035-01-278-1379
NSN 6145-01-089-7984
NSN 5835-01-370-4292
NSN 5915-01-331-4022
NSN 5950-01-260-7179
NSN 5975-01-386-3061
NSN 6645-00-943-9063
NSN 2925-01-400-2286
NSN 5990-00-424-8872
NSN 5990-01-463-2279