For no. 4 bearing
A rigid item, fabricated from a heat resistant allow, with or without insulation material added. designed to protect parts, areas or systems of an engine, gas turbine, aircraft from excessive heat damage. see also insulation blanket, thermal, aircraft gas turbine engine.
Classification: Parts of gas turbine aircraft engines, other than for use in civil aircraft
NSN 4140-01-426-6629
NSN 5950-01-438-7330
NSN 5975-00-956-6105
NSN 5975-01-386-7979
NSN 5895-00-168-1590
NSN 5998-01-294-7448
NSN 6645-01-162-8023
NSN 5920-01-330-8556
NSN 5999-01-225-9869
NSN 5990-01-517-7848
NSN 5999-00-278-5563
NSN 5935-01-133-3731