This approved grade B7 threaded stud is size 12 x 1 1/4 inches and has a thread size of 1 1/4". 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. It has a PSI of 1,25,000. Each is so