A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-210-0879
NSN 6320-01-078-8257
NSN 6105-01-185-5530
NSN 5998-00-284-0496
NSN 5855-00-610-4052
NSN 5998-01-517-6152
NSN 5998-01-089-9059
NSN 5960-01-027-8833
NSN 5920-01-534-7866
NSN 5925-01-634-0664
NSN 5960-01-521-0626
NSN 5965-01-541-9336