Comparable to DIN 84, but with a larger head diameter and a rather distinctive head profile. Manufactured to ISO 1580 or DIN eighty five. Please Observe that because of producing constraints, all nylon variants of this stuff are only "much like" and never "in complete accordance with" the common specified. https://stainlesssteelfixingssupp23108.spintheblog.com/30907116/5-simple-techniques-for-wood-screws