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 2925-01-039-6856
NSN 5985-01-011-0066
NSN 5895-01-368-8662
NSN 5965-01-633-8849
NSN 6610-00-186-9180
NSN 5920-01-647-6649
NSN 5975-01-519-8268
NSN 6240-01-235-7566
NSN 6645-00-580-9605
NSN 6220-01-334-8306
NSN 6110-01-080-9621
NSN 6145-00-472-9413