SJ 2494-1984 Cross recessed oval head screw fasteners SJ 2495-1984 SJ 2496-1984 fastener self-threading fastener heat-treated steel tapping screws - Mechanical properties of fasteners SJ 2497-1984 Cross recessed pan head tapping screw fastener SJ 2498-1984 Cross recessed countersunk head self-tapping screw fastener SJ 2499-1984 Cross recessed countersunk head self-tapping screw fastener SJ 2500-1984 Cross recessed oval head tapping screws SJ 2501-1984 Fasteners Cross recessed pan head tapping screws stainless steel flange drilling screws, nuts 316 stainless steel screws Shijiazhuang wholesale, 316 stainless steel pan head Phillips screws. 304 hexagonal bolts, 316 hose clamps, stainless steel screws, stainless steel slotted screws blind rivets stainless steel screws Shijiazhuang ring, stainless steel studs 11. Welding steel before its steel preceded by the letter "H", to distinguish it from other types of steel. Such as stainless steel wire for the "H2Cr13", it can be used to distinguish between stainless steel "2Cr13". 12. Electrical letters and numbers ① with silicon steel. DR represents the letter head of steel hot-rolled silicon steel electrician stainless steel screws Shijiazhuang sales, DW represents electrician cold-rolled non-oriented silicon steel, DQ represents electrician cold-rolled silicon steel. Digital ② letter, said after the iron loss value (W / kg) 100 times. Stainless steel screws, stainless steel nuts, stainless steel rivets, stainless steel bolts, screws ③ tail 316L steel letters "G" who expressed at high frequency testing; not added "G" are expressed at a frequency of 50 cycles under test. Such as steel DW470 represents electrical products cold rolled non-oriented silicon steel at 50 Hz frequency of maximum unit weight of iron loss is 4.7W / kg. Stainless steel screws Shijiazhuang wholesale | Jinan Road ground (Online) | Shijiazhuang stainless steel 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.