Fastener, Hexagon Bolt, U Type Bolt manufacturer / supplier in China, offering M1.6 Stainless Steel DIN 912 Hexagon Allen Drive Hex Socket Cylindrical Head Bolt for Machine Fasteners, Factory Wholesale Fastener M1.4 12mm DIN912 Stainless Steel SS304 Hex Socket Head Screw for Machine, Custom M8_25mm Carbon Steel Cup Head Hex Socket Self Locking Screw Nylon Patch Anti-Loosening Screw and so on.