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 7035-01-361-8821
NSN 5930-00-580-1665
NSN 6320-01-439-5264
NSN 5999-01-394-8363
NSN 5975-00-231-9499
NSN 6610-01-420-0904
NSN 5920-01-376-4422
NSN 5915-01-067-0954
NSN 6135-00-777-5562
NSN 6645-00-413-0461
NSN 6650-01-207-0829
NSN 6240-01-294-7772