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 5945-01-654-3926
NSN 5895-00-140-3308
NSN 2925-01-111-2927
NSN 5935-01-202-8381
NSN 5930-01-592-8323
NSN 5990-01-179-1000
NSN 6645-01-367-7201
NSN 6145-00-553-8196
NSN 6645-00-784-4256
NSN 5945-01-458-5838
NSN 6685-01-303-6512
NSN 6105-01-491-7169