1. Size: M4-M52, 3/16"-2" 2. Length: 30mm-3000mm 3. Class: 4.8, 6.8, 8 ,8.8 1) Standards: B7 B8 B8M DIN 975, DIN 976A, , UNC ROD, BSW ROD2) Size: M3-M56, UNC 6#-2", BSW 3/16"-2" length: 1000-3000mm,3-12 feet 3) Material: stainless steel, low carbon steel, carbon steel, alloy steel 4) Surface: Plain, Black, Zinc Cr+3,Yellow Zin c Cr+6, H.D.G. We not only make fasteners incl bolts/nuts/rods etc.But ...