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 6105-00-275-0826
NSN 5930-00-451-3228
NSN 6645-01-220-7490
NSN 6220-01-528-7232
NSN 6150-01-525-7961
NSN 6645-00-925-2887
NSN 7035-00-553-6951
NSN 5990-01-288-7393
NSN 6610-01-026-1560
NSN 6105-01-514-2294
NSN 5855-01-264-8599
NSN 5950-01-139-1954