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 4140-01-326-7033
NSN 5998-00-054-1356
NSN 6620-01-199-4005
NSN 5895-00-586-7739
NSN 6110-01-433-5822
NSN 5990-01-348-2497
NSN 5910-01-542-8237
NSN 6620-01-359-3920
NSN 6650-01-559-7635
NSN 6650-01-656-1969
NSN 7035-01-457-5645
NSN 6645-01-052-8331