Fastener Parts Introduction There are two main features of Hex Socket Head SEMS Screws with Flat, one is a hexagon socket and the other is a flat head. Hexagon socket screws, as the name suggests,-4.6/4.8/5.6/5.8/6.8/8.8/9.8/10.9/12.9/Grade 5/ Grade 8锛?/p> Case harden-- Surface hardness min450HV core hardness 270 ~ 390HV/290~370HV 鈼?Support non-standard customization 鈼?Country of Origin: China Applications Our advantage Customized--We are the manufacturer! sample &OEM&ODM are available! Safety--We have own test chart, all of our products have been rigorously tested in the factory. Certification--We have CE and quality management system certification. High Quality --Our company uses the most advanced equipment to make the best quality products.Fastener Parts website:http://www.junlyhardwaresupply.com/fastener-parts/
