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 5945-01-437-3454
NSN 6145-00-286-9588
NSN 5996-01-431-9759
NSN 5910-01-056-3655
NSN 5855-00-688-9954
NSN 6150-01-505-5756
NSN 6135-01-580-5726
NSN 5998-01-481-9406
NSN 6645-00-292-0093
NSN 6240-01-302-1624
NSN 5960-00-972-9595
NSN 5965-01-648-2590