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 6320-01-415-0953
NSN 6650-01-160-1110
NSN 5950-01-334-9638
NSN 6130-01-259-1049
NSN 5985-00-205-2922
NSN 6130-01-379-4853
NSN 5990-01-253-7647
NSN 5975-01-504-0210
NSN 6650-01-658-1748
NSN 5910-01-444-4591
NSN 5960-00-047-3944
NSN 6320-01-539-4789