Structural bolts Standard:ASTM A325 type 1 ,A490 type 1, Surface:Zinc plated, black finish,Plain.H.D.G..ETC Size:1/2"-1 1/2", **DIN6914 Surface:Zinc plated, black finish,Plain.H.D.G..ETC Size:M12-42 materials:carbon steel,stainless steel,etc. MOQ:20ton Delivery:30days after order is confirmed Payment:T/T or L/C at sight.