JB / T 9151.1-1999 Test methods fastener size and geometric precision bolts, screws, studs and nuts JB / T 9151.2-1999 Test methods fastener size and geometric precision wood screws JB / T 9151.3-1999 Fasteners test The method of size and geometric precision tapping screw JB / T 9151.4-1999 fastener size and geometrical precision test methods washer JB / T 9151.5-1999 fastener size and geometric precision test methods pins JB / T 9151.6-1999 Fasteners test The method of size and geometric accuracy rivet JB / T 9151.7-1999 Test methods fastener size and geometric precision ring JB / T 9151.1-1999 Test methods fastener size and geometric precision bolts, screws, studs and nuts 304 stainless steel screws Tai'an drop-resistant screw screws, stainless steel 316 bolts, stainless steel studs Laiwu drop-resistant screw screws, 304 stainless steel hose clamps, drop-resistant screw screw 316 screws, stainless steel cotter pin head screws, stainless steel screws slotted screws. Stainless steel screws, stainless steel lock nut 10. Stainless steel and heat-resistant steel ① carbon content of a few thousandths. Such as "2Cr13" average carbon content of the steel is 0.2%; if the carbon content in steel or ≤0.08% ≤0.03% who were former steel dubbed "00" and "0", the example 00Cr17Ni14Mo2,0Cr18 Ni9 etc. . ② major alloying elements in steel to a few percent, said the titanium, niobium, zirconium, nitrogen and other press said alloy structural steel micro alloying elements representation marked drop-resistant screw screw Texas, Jinan Road ground (Online ), drop-resistant screw screws 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.