This approved grade B7 threaded stud is size 8 1/2 x 1 1/4 inches and has a thread size of 1 1/8". This stud is made of 4140 alloy steel, and has a temperature range of -50 to 900ƒx? for liquid and -40 to 900ƒx? for air. This stud has a PSI of 1,25,000.