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 5855-01-389-8884
NSN 5915-01-173-2904
NSN 6320-01-072-2073
NSN 5945-01-273-2522
NSN 6105-01-195-0205
NSN 5975-01-537-5772
NSN 5895-00-740-7461
NSN 4140-00-060-4052
NSN 5895-01-128-0077
NSN 6220-01-621-4347
NSN 6645-01-152-5207
NSN 5925-00-986-8980