A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-114-1328
NSN 5925-01-096-8000
NSN 5985-01-531-1792
NSN 5960-01-166-4021
NSN 6105-01-367-2269
NSN 6620-01-502-9104
NSN 5999-01-210-0500
NSN 7035-00-703-3535
NSN 6150-01-579-3099
NSN 6650-00-172-7519
NSN 6135-00-175-7132
NSN 5910-00-373-8808