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 6320-01-181-9474
NSN 5925-01-507-6104
NSN 5960-00-421-1054
NSN 6145-01-459-4472
NSN 6685-01-055-7384
NSN 4140-00-471-2789
NSN 6645-01-035-3787
NSN 5925-00-525-4037
NSN 5895-01-215-1059
NSN 7035-01-606-9692
NSN 6130-01-623-1748
NSN 5910-01-433-2635