GB / T 5267.2-2002 non-electrolytic zinc flake coating fasteners GB / T 5267.3-2008 Fasteners hot dip galvanized coatings GB / T 5267.4-2009 surface treatment of corrosion resistant stainless steel fasteners passivation GB / T 5276 -1985 Fasteners Bolts, screws, studs and nuts the size of the code and label GB / T 5277-1985 fastener bolts and screws through holes GB / T 5278-1985 fastener cotter pin holes and wire holes GB / T 5779.1-2000 Fasteners - Surface discontinuities - Bolts, screws and studs for general requirements GB / T 5779.2-2000 nut fastener surface defects GB / T 5779.3-2000 Fasteners - Surface discontinuities - Bolts, screws and studs for special requirements 304 stainless steel screws 316 stainless steel bolts. 316 stainless steel flat pad, 316 stainless steel rivets, 304 stainless steel cotter pin, pin 304 304 316 stainless steel U-bolts stainless steel hose clamps, 304 stainless steel anchor bolts. 316 stainless steel rivet nut 7. Spring steel spring steel can be divided according to the chemical composition of carbon spring steel and alloy spring steel two categories, its steel representation Laiwu 316 stainless steel hose clamps, the former is basically the same high-quality carbon structural steel 3 Qingdao 16 stainless steel hose clamps, the latter basically the same as alloy structural steel. 8. Rolling steel ① preceded by the letter "G", expressed rolling bearing steel class. Stainless steel bolts, screws Taian 304 316 stainless steel hose clamps, screws ② carbon content of 316 high carbon chromium bearing steel steel is not marked, the chromium content of a few thousandths. For example GCr15. Steel representation carburizing bearing steel, structural steel and alloys basically the same. Laiwu 316 stainless steel hose clamps, Jinan Road ground (online consultation), 316 stainless steel hose clamps are 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 implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Jinan Road ground in leadership with the staff warmly welcome all inquiries negotiations to create the Jinan Daoqin better future.