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 6645-01-633-1852
NSN 6610-01-434-4958
NSN 6145-01-071-4688
NSN 2925-01-157-9204
NSN 6620-01-090-3803
NSN 6320-00-539-9283
NSN 5975-00-965-6909
NSN 5975-01-206-7146
NSN 5895-00-153-2595
NSN 5945-01-406-3200
NSN 5999-01-061-1155
NSN 5835-01-608-4285