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 6130-01-421-4296
NSN 5915-01-443-8217
NSN 7035-01-121-5905
NSN 6105-01-128-4682
NSN 6620-01-106-2814
NSN 5855-01-398-0090
NSN 4140-01-054-3553
NSN 5855-01-242-8428
NSN 6240-01-444-1519
NSN 6685-01-310-2212
NSN 5960-01-478-9493
NSN 6145-01-584-5884