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 6145-00-216-6613
NSN 6135-01-563-4445
NSN 5990-01-193-0487
NSN 6110-00-045-6323
NSN 5925-01-567-1205
NSN 6150-01-449-2932
NSN 2925-00-005-1618
NSN 5855-00-237-4088
NSN 6135-01-163-0332
NSN 5910-01-430-3276
NSN 5950-01-432-0242
NSN 6645-01-064-3711