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 6145-01-435-8762
NSN 5915-00-945-4654
NSN 5960-01-370-4285
NSN 6105-00-035-8150
NSN 6105-01-013-9252
NSN 5920-01-344-0122
NSN 5895-01-213-0252
NSN 5855-01-245-8689
NSN 5920-01-622-5490
NSN 6645-00-451-6462
NSN 5930-00-020-9771
NSN 5935-01-369-3092