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 5935-01-530-0362
NSN 5915-00-067-9727
NSN 5905-01-433-2146
NSN 6135-01-322-4655
NSN 7035-00-803-3056
NSN 5996-01-549-8877
NSN 6220-00-541-8515
NSN 5950-00-643-2116
NSN 6135-01-151-2705
NSN 5965-01-193-0420
NSN 6220-01-212-3254
NSN 5998-01-335-0558