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 4140-01-189-5610
NSN 5945-01-574-3130
NSN 5965-01-119-0243
NSN 6130-01-539-1129
NSN 6145-01-144-5728
NSN 5930-01-323-5875
NSN 5965-00-807-2491
NSN 6645-01-343-1676
NSN 5930-00-122-5267
NSN 6240-01-305-0908
NSN 5998-01-290-8408
NSN 6620-00-003-2020