Lock Screw, Compatible Threader Grainger Part Number 25XC43, 4Z974, Compatible Threader Manufacturer Part Number 10491, 23282, 23297, 97065, 97070, Compatible Threader Series 531, 811A, 815, Product Type Lock Screw, Fits Brand Ridgid, For Use With 1210 Pipe Threading Machine, 713 and 913 Quick-Opening Die Heads, Impact Rated No