Product Name: J Roofing Bolt with Hex Nut Steel and Rubber Washer Model NO.: SW-B012 Finish: Blue-White Zinc Plated Application: Building Grade: 4.8 Standard: DIN, GB, BSW Head Style: Round Connection: Common Bolt Type: J Type Material: Carbon Steel Surface: Zinc Plated Trademark: OEM Transport Package: Carton + Pallet Specification: 1/4x50 1/4x60 1/4x70. Origin: China Product Description J bolt with nut:Material: Carbon steelSize: all the sizes1MaterialsStainlesssteel, carbon steel2SurfaceTreatmentzinc plated3Standardunstandard 4Mould1.Dependoncustomer'srequiretomakethemould.beforemakethemould.2.Wesentthemoulddesigntocustomerapprovalfirst.Beforemoveontoproducts.3.Wesentsamplestocustomerto/confirm/ifirst. 5/confirm/iedsampleIfthefirstsampleisnotsatisfiedcustomer.wewillmodifythemolduntilcustomersatisfied. 6QC1.Materialsaretobecheckedcarefullybeforeproduction.2.Strictprocessingqualitycontrol7ApplicationfieldsFurniturehardware.electronichardware.constructionmachineryparts.metal. 8TargetMarketUS.Japan.India.Middleeast.Africa.SouthAmericaandEuropeetc.