Hex head self drilling screw with steel and bonded washer 19mm hex head sds with assemble epdm bonded washer 19mm, steel and bonded washer screw, zinc plated self drilling screw, 1022A material screw, China self drilling screw Description Brand DD Fasteners Standard DIN/ GB/ ANSI/ BS FOB Price $ 0.01~$ 0.08/piece Payment Terms T/T Material 1022A Carbon Steel/ Stainless steel Surface Treatment Znic Plated / Blue white zinc /Dacromet Diameter #6 #7 #8 #10 #12 #14 Lenth 13mm~350mm Supply ability Supply ability 5000tons/ per month OEM Service Yes Min.Order Quantity 1Ton/ Tons Ppackaging& Delivery Packaging Details Bags/ Boxes / pallet  Port Tianjin / Yiwu/ Shanghai Port