It is worth noting that in the stainless steel pan head screws and hexagon socket screws stainless steel cylinder head size measurements are based on the effective length of the head to be described below. The stainless steel flat head Allen screws inside (also called hex screws countersunk head) is a measure of the total length of the screw. SUS304 stainless steel screws popular terms refers to the use of stainless steel wire products containing nickel or nickel standards to eight or more. The main raw materials used by stainless steel screws austenitic 201,304,316,316L. Typically there is only 201,304,316 SHCS and other materials in stock, others will require processing and customized according to customer needs. When in the use of stainless steel hex screws, in the end we must first determine what material is SUS201 or SUS304 stainless steel shaft with a ring of Yantai, or SUS316's. Jining determine this material stainless steel shaft with a ring, you need to use the material according to the product in any place, what the occasion, there are no special requirements, how many hours of salt spray testing needs. Hardness intensity level, and so on. In the times that really is the national standard or non-standard. We recommend using the national standard stainless steel shaft with a ring, non-standard, and if there is no amount of words, not very well done. Moreover, non-standard stainless steel hex screws need to open the mold. But if that use non-standard stainless steel shaft with a ring Weihai, such as Allen head screws a little thicker, the hexagonal groove depth is a little deeper, not the national standard length dimension length, within the hexagonal want knurled head and roll spend a little deeper, and so on, that would not matter, only made the mold. Jinan Daoqin company can supply product range: M6-M12 diameter 12mm-150mm length stainless steel head square neck bolts (carriage bolts) Standard: DIN DIN603 stainless steel small head square neck bolts Standard: GB GB / T12-85 Stainless great circle head square neck bolts Standard: GB GB / T14-85 Weifang stainless steel shaft with a ring _ Jinan Road ground (certified) _ stainless steel shaft with a ring provided by Jinan Daoqin Trading Company. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) Shandong Jinan, hardware accessories leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Jinan Road ground in leadership with the staff warmly welcome all inquiries negotiations to create Jinan Daoqin a better future. You can also access (www.daoqinshangmao.com/supply_details_39828860.html), for more information about the company.