HAIYAN YUANYANG STANDARD PIECE CO., LTD

Established in 2003, As a China Concrete Bolts manufacturers and concrete screw suppliers with years of experience in producing high quality fasteners. Yuanyang Fasteners engages in broad scopes of high quality products in American, German, Japanese and Astralian standards. The catalogue includes Concrete screw Series.https://www.non-standardfasteners.com