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 6130-01-398-6953
NSN 2925-00-275-1807
NSN 5950-01-514-5159
NSN 6650-00-525-3446
NSN 6130-00-960-9158
NSN 6150-01-224-2706
NSN 5925-01-634-0664
NSN 6150-00-877-3954
NSN 5905-01-332-1006
NSN 5996-01-630-1611
NSN 7035-01-202-8172
NSN 5855-00-487-9691