A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-007-9541
NSN 2925-00-814-8745
NSN 7035-00-981-7216
NSN 5999-00-263-3264
NSN 5935-00-096-2906
NSN 6240-01-612-6113
NSN 5925-01-600-6772
NSN 5905-01-263-4944
NSN 6645-00-596-5388
NSN 5835-01-264-8782
NSN 5965-01-367-7380
NSN 5990-01-386-5561