Self Drilling Screws are mainly used on the roofing sheets . Place of Origin : Handan, China (Mainland) Model Number:All size Standard:DIN, DIN , ANSI/ASME, BS, GB, JS, Non standard. Product name:screw ,drilling screw , self drilling screw Materials:Carbon steel Diameter:M3.5-M6.3, 6#-14# Length:16mm-175mm, 5/8"-7" Surface finish: Galvanized (Various of color), dacromet, black, mechanical zinc Head type:Hex Head, CSK, Slotted Head Packing:Bulk or Small boxes.then in carton .pallet
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