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 5999-00-529-0157
NSN 2925-01-368-5773
NSN 6220-00-020-5028
NSN 6150-00-976-9428
NSN 5999-01-266-2025
NSN 5855-01-369-5037
NSN 6645-01-129-6753
NSN 5998-00-800-6769
NSN 5965-00-127-1660
NSN 4140-01-224-2847
NSN 6610-00-647-3830
NSN 2925-01-456-6840