Used on bnf engine, aircraft, t64-ge-3/7 (h-53b/c/h, hh-53b). 3b 1st end thread class 12 1st end thread quantity per inch passivate surface treated unj 1st end thread series
Used on way-wolff boiler,model 5848-14e board 210 ft wmec a and b class coast guard vessels. 14.875" overall length 12 bolt hole quantity w/850.0 degrees max. temperature