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 5855-01-321-3881
NSN 5930-01-296-7466
NSN 5915-00-067-7464
NSN 6620-01-068-6224
NSN 6135-00-947-0406
NSN 6145-00-115-1845
NSN 5855-01-551-4525
NSN 5998-01-286-4389
NSN 6320-01-119-3935
NSN 6145-01-157-3488
NSN 6240-01-462-5433
NSN 5915-00-949-3476