A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5855-01-481-3906
NSN 5990-00-402-7721
NSN 5950-01-580-4658
NSN 5920-01-015-2458
NSN 6650-01-069-2501
NSN 5835-00-257-2852
NSN 5950-00-034-1361
NSN 5920-01-410-7740
NSN 6610-00-034-3709
NSN 5855-00-688-9954
NSN 5920-00-344-0980
NSN 2925-01-464-3093