The size of the insert refers to the inside diameter and thread pitch.
M12x1.25 Carbon Steel Insert 15.0 Part # 12123. Insert Length Metric is 15.0mm. Professional Thread Repair. TIME-SERT thread repair system the ultimate way to repair threads in stripped or damaged holes. This listing is for (1) ONE insert. Please note: The size of the insert refers to the inside diameter and thread pitch.