DIN 6915 - 1999 High-Strength Hexagon Nuts With Large Widths Across Flats For Structural Steel Bolting (M12~M36)
Equivalent norms included: ISO 7414, EN ISO 14399, UNI 5713
| Legend | Making |
| P=pitch | Carbon Steel:10,12 |
| K=height of the nut | Thread |
| D=the nominal diameter of the thread | Surface:BLK,ZP,HDG,etc |
| E=The length of the diagonal | |
| S=The length of the flat |