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 5965-01-054-8212
NSN 5990-00-686-5868
NSN 6135-00-162-2437
NSN 2925-01-430-4206
NSN 5915-01-476-7124
NSN 6135-01-100-3593
NSN 5855-01-540-4797
NSN 6145-01-208-9224
NSN 6240-01-505-2777
NSN 5895-00-218-1355
NSN 6645-01-009-7678
NSN 6130-01-061-5236