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 5950-01-435-6354
NSN 5996-00-083-6121
NSN 5895-00-842-9457
NSN 2925-00-701-9991
NSN 5855-01-028-8387
NSN 5965-00-170-5254
NSN 5998-00-827-0527
NSN 6145-01-229-5654
NSN 6320-01-544-6447
NSN 6220-00-583-9889
NSN 6645-01-152-1092
NSN 6650-01-209-6318