A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5855-01-634-0259
NSN 5915-01-366-3306
NSN 6645-00-216-6126
NSN 6645-01-463-4314
NSN 6240-00-138-9124
NSN 2925-00-845-1480
NSN 6145-00-515-6931
NSN 5895-00-241-9375
NSN 5965-01-448-9585
NSN 6645-00-903-4916
NSN 6110-01-481-3942
NSN 6130-01-282-3700