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 5996-01-547-9155
NSN 5835-01-137-6075
NSN 5990-01-408-6142
NSN 5835-00-060-8436
NSN 5950-01-340-9151
NSN 6135-01-544-5956
NSN 2925-01-633-4048
NSN 5915-01-268-5260
NSN 5925-01-527-1636
NSN 6685-00-082-3153
NSN 6145-00-036-7085
NSN 5915-01-512-8851