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 5975-00-472-6042
NSN 6320-01-350-5570
NSN 5930-01-185-1993
NSN 6650-01-261-5239
NSN 6685-00-478-7008
NSN 6240-01-030-4746
NSN 5950-00-452-7265
NSN 6240-01-425-1939
NSN 5910-01-210-9822
NSN 6620-01-633-8443
NSN 7035-00-946-2642
NSN 5895-01-501-8717