Product name: Chamfered plain washers for high-strength bolts(DIN6916) Character: 1)Size: M12 to M36 2)Material: Carbon steel, C50 3)Surface: Plain, zinc plated, Black, H. D. G Except washer for high strength bolts DIN6916, our flat washers DIN125A, DIN9021 are selling very well by competitive price and good quality. We also could do special flat washers according to your drawing. We will be very appreciated to receive your enquiry for flat washers. Thanks!