Product Name: Carbon Steel Hardened Bugle Head Black Phosphating Drywall Screw Standard: DIN, GB, ANSI Head Style: Bugle Head Connection: Common Bolt Groove: Phillips Type: Square Head Material: Carbon Steel Trademark: QIMU Transport Package: Ulk Packing in Cartons, Then Put on Pallets, or as Specification: 3.5 Origin: China Product Description Model NO.NameRL-S01Carbon Steel Hardened Bugle Head Black Phosphating Drywall ScrewDia RangeLength RangeM3.5-M6.3/#6-#149.5MM-250MM/3/8''-10''Drive AvailableSuface AvailablePhilip,Torx,Square,etcZinc Plated,Dacromet,Ruspert,etcGeneral MaterialGeneral PackingCarbon Steel&Stainless SteelSmall Color Box Or BULK CartonDrawing FormatProcessing MethodDwg, Pdf, PNG,etcCold HeadingInspectionInspection Machines100% Inspection Before ShipmentMicrometer,Torsion Machine,Durometer,Coating Thickness Gauge, etcTrademarkSpecificationEmblem or OEMCE, RoHS, SGSTransport ModeOriginSea&Airzhejiang, ChinaPayment WayService30%T/T+70%T/T, L/CFOB,CIF.