ASME B18.2.5M pdf download Metric 12-Point Flange Screws 8 WRENCHING HEIGHT Corners of the 12 points shall be fully formed and reasonably uniform over the wrenching height, K w . Head drive root radius, R 4 , applies to the entire length of the wrenching height, K w (see Table 1). 9 GAGING OF 12-POINT FLANGE HEAD The head shall...