These flat-head bolts are available with M6, M8 and 1/4-20 threads. Either plain zinc-plated or black zinc-plated steel, they are available in a large range of sizes from 12mm to 70mm (length is the bolt barrel only). The broad (15mm to 17mm), flat heads distribute force over a large area, making these bolts ideal for use with both hard and soft woods, in addition to surface-mounted hardware. The heads are 2.5mm high and have bevelled edges. Made in Germany.