A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-00-067-4968
NSN 5960-01-217-1479
NSN 6110-00-811-2882
NSN 5920-01-512-8586
NSN 5985-01-336-2406
NSN 5930-00-514-2095
NSN 5975-00-682-4391
NSN 5910-01-351-2844
NSN 5985-00-480-6235
NSN 5905-00-366-7578
NSN 5965-00-421-9007
NSN 5930-01-052-3525