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 6110-01-553-2052
NSN 5945-01-195-7360
NSN 5920-00-146-4109
NSN 6145-01-445-7167
NSN 5975-01-120-9810
NSN 6105-00-722-1178
NSN 5965-01-578-6911
NSN 6135-00-321-6707
NSN 5910-01-524-8499
NSN 6130-00-497-8419
NSN 6105-01-565-5239
NSN 5925-00-499-2160