A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-00-862-9965
NSN 5999-00-497-2140
NSN 5920-01-120-0994
NSN 5996-01-186-4790
NSN 6320-00-070-4544
NSN 6650-01-100-3185
NSN 5960-01-224-7151
NSN 6130-01-069-9187
NSN 5985-01-485-2416
NSN 5990-01-255-7387
NSN 5975-01-544-5972
NSN 5920-00-351-8428