Designed for max temp of 2600 degrees f
A brick having a low thermal conductivity and used as a backing for the more dense refractory brick.
NSN 5835-01-125-6676
NSN 5990-00-045-7929
NSN 6240-01-158-4266
NSN 5965-01-129-8551
NSN 6150-01-015-4751
NSN 6145-01-142-5732
NSN 5925-00-202-0938
NSN 5895-00-405-4579
NSN 5930-01-242-5097
NSN 6105-00-244-2321
NSN 5935-01-241-9864
NSN 6320-01-195-5583