zhejiang Kaisheng hardware co., Ltd   Contact Name:Sandy Phone:86-578-6733557 Fax:86-578-6733555 Address:Gangtou industrial zone Zipcode:323903 Email: Website: http://www.kswj.cn DIN product:Cap nutsHexagon socket head screwsHexagon socket set screws

	DIN 917 Hexagon cap nuts
	DIN 1587 Hexagon domed cap nuts