A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5895-00-962-5564
NSN 6320-00-790-4844
NSN 5835-01-044-2628
NSN 5920-01-650-1820
NSN 6645-01-533-8408
NSN 5960-01-543-0235
NSN 5935-01-217-8685
NSN 2925-00-450-7783
NSN 6150-01-108-6528
NSN 5855-01-191-3404
NSN 5895-00-230-4827
NSN 6135-00-196-5267