A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-579-3510
NSN 5950-00-618-0024
NSN 6645-00-399-1862
NSN 5998-00-208-3362
NSN 5985-01-534-3836
NSN 6240-01-359-2721
NSN 6645-00-935-7046
NSN 5960-00-468-5353
NSN 6610-00-222-8970
NSN 2925-01-113-6904
NSN 6650-00-111-1081
NSN 5905-01-130-8975