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 5999-01-191-4153
NSN 5990-00-999-8486
NSN 5855-00-688-9954
NSN 6320-00-725-0754
NSN 5999-01-187-7899
NSN 5895-01-287-4108
NSN 5855-00-797-8217
NSN 6145-01-540-2225
NSN 5965-01-029-5222
NSN 6645-01-252-8870
NSN 5835-01-067-9271
NSN 6105-00-541-8472