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 6105-01-559-4579
NSN 5935-01-421-1802
NSN 5950-01-391-6550
NSN 6105-01-447-5129
NSN 5910-01-278-9009
NSN 6645-01-417-1913
NSN 5950-01-337-3403
NSN 5960-01-487-6436
NSN 7035-01-443-3052
NSN 7035-00-541-8516
NSN 6110-00-864-0947
NSN 4140-01-641-6002