A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5915-01-296-8974
NSN 5998-00-228-4892
NSN 6130-01-364-8830
NSN 6135-01-504-4309
NSN 6610-00-883-2804
NSN 6105-01-247-0398
NSN 5935-01-400-1336
NSN 6320-01-345-5818
NSN 6610-01-032-5335
NSN 5895-00-840-3776
NSN 5945-01-038-4595
NSN 6135-01-204-8712