Wenzhou Xinsen Fasteners Co.,ltd   Contact Name: Jin Phone:0086-0577-86456668,86455556，13305776156 Fax:0086-0577-86456669,86455557 Address:Linjiang,Wenzhou, Zhejiang, China Zipcode:325000 Email: Website: http://www.seensoun.com DIN|IFI| DIN product:Hexagon head bolts and screwsHexagon head bolts and screws for use in structural steelworkHexagon nutsHexagon socket set screwsWashers for use in structural steelwork IFI product:Square Head and Slotted Headless Set Screws DIN 561 Hexagon set screws with small hexangon and full dog point DIN 564 Hexagon set screws with samll hexagon,half dog point and flat cone point