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 4140-00-538-8959
NSN 5835-01-034-1255
NSN 6130-01-231-7333
NSN 7035-01-056-5350
NSN 5855-01-054-9014
NSN 5975-01-604-9430
NSN 5935-00-980-6869
NSN 6130-01-624-1017
NSN 6645-01-509-3221
NSN 6150-01-512-1952
NSN 5985-01-122-9476
NSN 5965-00-529-0602