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 4140-01-321-5784
NSN 5925-00-373-0936
NSN 5910-00-090-3779
NSN 5920-01-587-6542
NSN 5915-01-487-7703
NSN 6105-00-337-0904
NSN 5990-01-356-4259
NSN 6135-01-243-5797
NSN 5915-01-525-6504
NSN 5835-00-216-4568
NSN 7035-00-865-9105
NSN 6130-00-292-5058