In general, the height of the nominal diameter is more than 100 % of the height is called a high nut. Used for joint bolts and bolts, height adjustment, etc. The screw size on both sides is different, so it can be used for conversion purposes. One Side W3/8 W1/2 Side Width 1.6 inches (40 mm) Total Length 1.6 inches (17 mm) Double Side Width 0.7 inches (17 mm) Monotaro Cord: 41894045