A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-644-3496
NSN 5999-01-152-9179
NSN 2925-00-806-7972
NSN 6650-00-001-2472
NSN 5935-00-837-3401
NSN 5996-00-926-2528
NSN 5910-01-471-8338
NSN 5975-01-196-3890
NSN 6145-00-797-3454
NSN 6135-01-167-7604
NSN 5998-01-524-3207
NSN 2925-01-442-0878