rail nut: 1Materials:Carbon steel 2Surface:Black 3We can produce by customer's drawings. 4Certificate:ISO9001:2008,SGS Black heavy rail hex nut Details of the product:1Product name: Hex nut2Materials: Carbon steel 3Surface: Black, HDG, Zinc plated, Dacron etc.4Proven technique & good quality.5Size range: M6-M426Standard: ANSI, DIN, JIS, AS, BS, UNI, ISO, GB,etc. 7Packaging: Iron drum , wood ...