This approved grade B7 threaded stud has a temperature range of -50 to 900ƒx? for liquid and -40 to 900ƒx? for air and a PSI of 1,25,000. This stud is size 8 3/4 x 1 1/8 inches and has a thread size of 1 1/8". Made of 4140 alloy steel. Each is sold separ