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 5905-01-283-5333
NSN 5945-01-008-9917
NSN 6135-00-128-1633
NSN 2925-00-863-8578
NSN 6220-00-621-8149
NSN 5925-00-686-3364
NSN 6685-01-243-5802
NSN 6135-01-584-0941
NSN 6610-00-978-5133
NSN 5975-00-894-1125
NSN 6620-01-217-3216
NSN 5855-01-247-9666