A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6320-01-006-6138
NSN 6135-01-100-3593
NSN 5855-01-656-5921
NSN 6320-01-140-9343
NSN 5975-00-514-3340
NSN 4140-01-464-8058
NSN 6320-01-592-6248
NSN 5998-00-233-6401
NSN 5835-00-752-6065
NSN 5999-01-330-1143
NSN 5945-01-043-0389
NSN 2925-00-138-5542