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 5998-00-419-0425
NSN 5998-01-602-3478
NSN 6650-01-086-7003
NSN 6150-01-327-4183
NSN 5998-01-422-1600
NSN 5835-01-222-2437
NSN 7035-01-229-0941
NSN 6610-01-371-3006
NSN 5835-01-080-7784
NSN 6135-01-652-9622
NSN 5855-01-457-2953
NSN 5915-01-140-8465