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 5990-01-280-0321
NSN 6620-00-290-6505
NSN 7035-00-018-0350
NSN 5950-01-539-7434
NSN 6135-01-339-3873
NSN 5945-01-426-1064
NSN 5990-01-204-7576
NSN 5990-01-128-7599
NSN 6620-01-420-8666
NSN 5910-01-440-9558
NSN 6130-01-486-1235
NSN 5999-01-454-7992