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 6610-01-221-2606
NSN 6110-00-014-2384
NSN 5910-01-441-9868
NSN 6110-00-482-2205
NSN 5925-01-463-8594
NSN 5930-00-157-1382
NSN 6105-01-327-2884
NSN 5835-01-339-0542
NSN 5975-00-406-4753
NSN 6320-00-108-7049
NSN 5895-01-591-5301
NSN 6645-01-480-3962