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 5950-01-581-7278
NSN 5925-01-318-5930
NSN 5975-01-644-4780
NSN 5996-00-562-3838
NSN 5905-00-350-8355
NSN 5920-00-140-8912
NSN 7035-01-555-8793
NSN 5996-00-539-7956
NSN 6150-01-005-0150
NSN 5965-00-069-2723
NSN 6645-00-489-8575
NSN 5998-01-612-2831