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 6110-01-396-0864
NSN 5925-01-178-2555
NSN 5905-01-084-9138
NSN 6105-01-304-1066
NSN 5920-01-317-8618
NSN 6320-00-284-1524
NSN 6145-01-444-2423
NSN 6135-00-715-4001
NSN 7035-01-136-3618
NSN 5985-01-038-0213
NSN 6110-01-216-1203
NSN 6620-00-978-8830