China high quality cross flat head black phosphate bugle head self drilling drywall screw

  Product Description                                                                                     Collated Drywall Screws   Collated drywall screw, also known as chain belt drywall screw, is a widely used in the decoration engineering (ceiling, partition) chain with screws     All screws is made by the good quality materials and professional work team , and passed the salt-fog test more than 48hrs.    1. Raw materials : AISI-C1022 2. Materials properties: surface carburization 0.10mm 3. Surface treatment; electric zine , phosphating Black phosphating, gray phosphating, color zinc, white zinc, dacromet  4. Examination : passed the salt-fog test more than 48 hours. 5. Product spec :                                M3.5X25,                                M3.5X30,                                M3.5X35,                                M3.5X40                                M3.5X45,                                M3.5X50 etc ..                                M3.9X11                                M3.9X32 etc .   Auatralia common size :6g x 25mm, 6g x 32mm Europe common size :3.5x25, 3.5x32, 3.5x35, 3.5x41, 3.5x45, 3.5x51, 3.5x55, 3.9x25, 3.9x35, 3.9x45, 3.9x55 America common size : 6x1", 6x1 1/4", 6x1 1/2", 6x2"   Package:  50 piece to a strip , 10 strip to  per box, 10 boxs to per carton   Our Services  Application Supermarket, marketplace Underground, air port, bus station 
Building lobby, metro station Hotel, restaurant, railway station School, office, meeting room, hospital Business building Tips: If you have any special requirement, please advise us the length, width, height and the thickness, also the quantity. Thanks We are 19 year manufacturer, Product apply in: Asia, Mid East, Europe, South America, Africa, Australia and so on.   Quality inspection procedure 1. We have five strict QC processes including incoming materials QC, IPQC (in process QC on patrol), LQC (line QC), FQC (final product QC) and OQC (output QC before shipping). 2. High quality 1100 aluminum alloy or galvanized steel.   Payment  T/T     30% deposit and 70% must be pay before shipment.  Delivery time  7-14 days  Packing  Standard carton (Our logo , your logo, or not logo)  After service  If you find any product problems in the first order, we will give you the new parts for free to replace in the next order. The real pic for your reference: