DIN 6923 flange nut 1)Standard:DIN,ASIN 2)Material:Carbon steel, stainless 3)Diameter:M3-M48 DIN 6923 flange nut Standard: DIN,ASIN Size: M3-M48, 1/4"-3"Material: alloy steel, carbon steel 35#,stainless steel, brassGrade: 8.8,10.9,12.9,SAE J429 GR.5/GR.8Surface: Black, Zinc Cr+3, Yellow Zinc Cr+6,H.D.G., Dacromet, etc.Packing: bulk, box packing, polybag hex flange nut DIN 6923