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 5950-00-246-9755
NSN 5975-00-904-0002
NSN 5925-00-369-1596
NSN 5835-01-027-1828
NSN 6620-01-432-7032
NSN 6130-01-566-2731
NSN 4140-00-499-8216
NSN 5920-01-599-9293
NSN 5895-01-163-1235
NSN 2925-01-014-0118
NSN 5960-01-391-8860
NSN 5990-01-595-9441