... -M20 1/4''-5/8'' Length: 6mm-300mm 2)Standard:DIN, UNC/UNF,BSW,GB 3)Grade:4.8 8 ... 1/4''-5/8'' Length:3/8''-12''2)Standard:DIN UNC/UNF BSW JIS ISO3)Grade:Carbon Steel:4 ... Bar,Wooden Screw,Anchor Furniture Screw,Nuts,Washer and Non-standard Parts) If you are interested in these products,Pls ... worldHaiyan High Strength Fastening Parts Co.,Ltd has grown rapidly over the last 23 years(Since 1987) to become a ...