Non- Standard,Material:Carbonsteel,ss304,ss306,brass,welcome oem Standard:non-standard With across flats : 3mmweight:20.5gThickness:3mm Material: Material:Carbonsteel,ss304,ss306,brassGrade: 4.8,8.8,10.8,SAE J429 GR.5/GR.8Surface: Black, Zinc Cr+3, Yellow Zinc Cr+6,H.D.G., Dacromet, etc.Packing: bulk, box packing, in carton with pallets ,according to customer requirement .Delivery Lead Time:30- ...