1,hex nuts 2,material:Q235,45#,40CR/AISI5140 ... 4,Standard:DIN,JIS,AISI 5,ISO9001:2008 hex nutsShijiazhuang JiXing machinery manufacturing Co., LTDWe produce some ... fastener and rating fastening piece; Such as screw, nuts etc. It can be used for valve part, ... have our own factory and manufacture bolts, screws, nuts and washers. Our company aim to provide you ... our company and ability. Series steel Hex nuts