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. Made of 4140 alloy steel. This stud is size 7 1/4 x 1 1/8 inches, a thread size of 1 1/8". Each is sold separately.