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 6135-01-276-5402
NSN 7035-01-484-7414
NSN 5920-01-361-8835
NSN 6650-00-548-9797
NSN 5915-01-132-9123
NSN 5998-01-192-0537
NSN 6145-00-055-7268
NSN 6645-01-589-0840
NSN 4140-01-539-8629
NSN 5895-01-011-9038
NSN 6610-01-187-0875
NSN 4140-00-788-6098