Description features:Company Plicy: Quantity first, Credit top We , Wenzhou YiLi Machinery Developping Co., Ltd. are Sino-American joint Venture, Total capital costa are USD 8 million. The whole company covers a area of 66 are, 56,000square meters. We are biggest one fastener manufacturer in Wenzhou, We export large quantity to Europe, America, Middle East Area, Southeast Asia and other countries; The products are all kinds of standard fasteners like hex head bolts,hex head cap screws,hex socket screws,Speedway guardrail bolts, hex nuts , threaded rods,flat washers and spring washers,the standards that we use are Germany standard DIN, America standard ANSI,ASTM, International standard ISO ,British standard BSW etc. Technical information The size under M20 are cold forged, the size on the M22 above are hot forged, the nuts are the same. The grade of the hex bolts(Metric) are Grade 4.8, 5.8, 6.8, 8.8, 10.9, 12.9, ; (ANSI)Grade 2, 5, 8, B7;the grade of hex nus(Metric) are grade 6 S181, 8 ,10, (ANSI) Grade 2, 5, 8 ,and so on. The material we use carbon steel: C1008, C1010, C1035, C1045, alloy steel 40Cr, 35CrMo 42CrMo ,and so on. And some stainless steel A2,A4, SS304, SS306 and so on. We have two pieces €?made in Taiwan €?heat treatment equipments We have two packing items, one is carbon bulk, another one is small box. We can make the surface are : plain, black, white blue zinc plated, white zinc plated, yellow zinc palted, hot dip galvanised and so on. Use of the products our products are widely used for the energy, transportation,metallurgy,base construct and important project like big span workshop,railroad, highway bridge,underground,firepower,nuclear-powered electricity station,high-floor building,palestra and the process of heavy engineering machinery structure and so on. If you are interesting to cooperate with our company, please let us know by return Email.we will supply you with high quality and reasonable price. Wish and Regards Roger Standardfastener AT Gmail DOT c