... nut: 1Materials:Carbon steel 2Surface:Black 3We can produce by customer's drawings. 4Certificate:ISO9001:2008,SGS Black heavy rail hex nut ... . 7Packaging: Iron drum , wood pallet ,etc.8We can produce by customer's drawings.9Certificate:ISO9001:2008,SGSOur strength on exporting:1.Our ... being used. We exported to world markets, such as U.S.A., Canada, Cuba, Germany, Japan, Singapore, Malaysia and Africa ...