2011 was a year of domestic smart phone explosion, and 3G Internet of Things became the intersection of smart phones and e-commerce. The development of the mobile Internet of Things is inseparable from users. The growing number of mobile phone users in China is an important guarantee for the development of the mobile Internet of Things and is also its potential customer base. The Ministry of Industry and Information Technology recently released the April 2011 operating status of the communications industry, showing that from January to April this year, the country’s mobile phone subscribers had a cumulative net increase of 41.98 million, which exceeded 900 million. Among them, the net increase of 3G users was 20.523 million, reaching 67.572 million.
With more and more applications of smart phones, some key national economy enterprises represented by commerce, security, home appliances, electricity, transportation, medical care, logistics, etc. have begun to gradually accept the concept of the Internet of Things, adopting technologies and products relating to the Internet of Things. Industry's production, service and Other links. The application that can bring affordable and convenient life to the people is a good application and will be favored by the people.
Thus, as industry insiders say, 3G Internet of Things is a new industrial revolution. It is a brand-new sales channel for enterprises; for consumers, China's Internet of Things will meet the needs of modern high-speed living and create a relaxed, happy, convenient and free consumer experience for people.
1.Application scope: Used for threaded joints between thin metal (aluminum, copper) parts and thicker metal parts (main body), wood panels, wall surfaces, etc.. Must be used with the corresponding specifications, slot type Screw spigot with.
2. Reference standard
Pan head cross slot GB845, ISO7049
Countersunk head cross slot GB846, ISO7050
Umbrella head cross slot GB847, ISO7051
Japanese JISB1125 and American ANSI/ASME B18.6.4 have various head types.
3. head type: the same as the head type of self-tapping nails. New and old national standards have three head types: the old national standard for round head (R), countersunk head (F) and half countersunk head (O), the new national standard has a pan head (P), countersunk head (F) and half countersunk head (O). American machine Screws have a variety of head types, in addition to the commonly used pan head, countersunk head, half countersunk head in addition to large flat head, hexagonal Washer head, Warwick head, etc.
(3), tooth type: generally common A teeth and AB teeth. The new version of the IFI standard has been eliminated A tooth products, but due to market needs, some companies are also producing A tooth products, more domestic with A tooth. A tooth AB tooth products are mainly different in the number of teeth, generally speaking, A tooth for coarse teeth, AB tooth for fine teeth, but A tooth and AB tooth products also have differences in tooth outside diameter and head diameter size.
Self Tapping Screws ,Self Tapping Metal Screws ,Self Tapping Bolts ,Stainless Steel Self Tapping Screws
Kunshan Zhonggu Precision Hardware Co., Ltd. , https://www.zgfastener.com