Ex: 1/8 x 0.50 -PPB: 1 minute Screw x 0.50 "long, PPBEx: 5/16 x 0.50 -PPB = 2.5 / 8 x 0.50-PPB: 2 and a half Screw x 0.50" long, PPBEx: 5 / 32 x 0.50 -PPB = 1.25 / 8 x 0.50-PPB: 1 minute 2% half screw x 0.50 "long, PPBEx: 1/4 x 0.50-PPB = 2/8 x 0.50-PPB: 2 points Screw x 0.50 "Long, PPB Note: sometimes labeled coarse or fine tooth stainless steel screws Qingdao hole with a ring, stainless steel plug, stainless steel bolts, screws 316. 316 flat pad UNF: fine teeth: the electronics industry is more commonly used stainless steel cotter pin hole with a ring Tai'an, stainless steel Gasket UNC:. Coarse teeth: heavy mechanical structures more commonly .Ex: 3/8 x 0.50 Texas stainless steel hole ring, UNF -PPB: 3 minutes fine screw x 0.50 "long, PPB.C-2: Length Code: anchor bolts: securing the machine and so on the ground with screws also called bolt inch screws. and US differences visually difficult to separate, Britain, the United States made the difference is that the thread rolling screws inch screws angle is 55 degrees, while the US-made screws Roll angle of 60 degrees, which is two standard screws in most of the time is common, but not stainless steel screws 1/2 size hole with a ring, because the standard 1/2 inch thread 1 / 2-12 teeth, while the US system is the 1 / 2-13 teeth. stainless steel hose clamps, stainless steel cotter pins, stainless steel adapter, stainless steel micro screws, stainless steel American standard screws, the screws 316, 316L stainless steel screw holes with a ring Zibo | Jinan Road ground (certified) | stainless steel hole 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 implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy Customer demand in Jinan Daoqin leadership with the staff warmly welcome all inquiries negotiations to create the Jinan Daoqin better future.