Ningbo Hualong Fasteners Co, Ltd.   Contact Name:Zhao Phone:0574-86534199，13566521999 Fax:0574-86533458 Address:Changhong Village, Jiulong Lake, Zhenhai, Ningbo Zipcode:315205 Email: Website: http:// DIN|IFI|SP| DIN product:Double end studsHexagon head bolts and screwsHexagon head bolts and screws for use in structural steelworkHexagon nutsHexagon socket head screwsWashers for use in structural steelwork IFI product:Large Size Heavy Hex ScrewsSquare and Hex Bolts and ScrewsStructural Bolting SP product:BoltsStuds DIN 976-1 Metric thread stud bolts DIN 976-2 Metric interference-fit thread stud bolts