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 5925-01-034-9288
NSN 5945-00-403-4588
NSN 2925-01-515-7026
NSN 6645-00-191-4978
NSN 4140-00-804-5667
NSN 5996-00-107-2499
NSN 5855-01-171-2818
NSN 5999-00-106-0603
NSN 6610-01-099-9403
NSN 6220-01-020-8703
NSN 5998-01-510-9455
NSN 5925-01-025-0322