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 5935-01-361-8817
NSN 6320-00-831-2227
NSN 5950-01-359-0215
NSN 6135-00-209-6918
NSN 6320-01-478-9351
NSN 6145-00-323-6021
NSN 6130-01-362-2470
NSN 5925-01-285-0401
NSN 5975-01-411-7724
NSN 6145-01-509-1851
NSN 5950-01-621-6069
NSN 5910-01-301-4803