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 5925-01-367-6118
NSN 5945-01-536-0072
NSN 6135-00-120-1034
NSN 5999-00-170-9665
NSN 5975-00-529-3835
NSN 5990-01-538-4880
NSN 5855-00-107-7993
NSN 6150-00-101-8895
NSN 4140-00-152-7092
NSN 5998-00-490-4399
NSN 6620-01-488-9547
NSN 6130-01-004-8977