wood screw head Wood screw heads are shaped to provide an improved grip on the entire screw. Slotted-head wood screws have the advantage of not distorting the wood when screwed in. Thanks to their shape, slotted countersunk wood screws allow you to drill into the wood without damaging it. A4 stainless steel A4 grade steels, alloyed with molybdenum, are "acid resistant" and provide better corrosion resistance. A4 is used extensively in the cellulose industry as this grade of steel is developed for boiling sulphuric acid. It is also suitable to some extent for chloride environments. A4 is also frequently used in the food and shipbuilding industries. ISO / DIN standards This product complies with DIN 95 standards (NFE25-605, UNI 703). These standards ensure professional quality and simplify identification of similar products. Below is the table of technical dimensions (according to size): d 2,5 3 3,5 4 4,5 5 6 dk 4,7 5,6 6,5 7,5 8,3 9,2 11 k 1,5 1,65 1,93 2,2 2,35 2,5 3 t (min) 1 1,2 1,4 1,6 1,8 2 2,4 n 0,6 0,8 0,8 1 1 1,2 1,6 Length (L) depends on your choice in the product specifications before adding to basket. Subscribe to our newsletter : Subscribe I accept the terms and conditions and the privacy policy