Material: A2(SS304)A4(SS316) Size:M6-M15 Thickness:6mm ... origin:Jiangsu,China(mainland) Brand name:Dingsheng Material; SS A2(304)A4(316)Size: M6-M15 Thickness:6mm-15mm ... Descript ion : NameSpring nutsBrand nameDingshengSizeM6-M15Thickness 6mm-15mmMaterialSS A2(304)A4(316)Colorsilver,plainPackingusually packed in bulk,also ... produing the variety of screws .Photoes as following: A2 spring nuts