M8 Flat Head Din 903 Chrome And Nut Hardened m4 flat head carbon steel carriage bolt

1. Bolt is A type of fastener consisting of head and screw (cylinder with external thread), which needs to be matched with nut to fasten and connect two parts with through-hole

2. There are hexagonal head, round head, square head, countersunk head and so on. Hexagonal head is the most commonly used. General countersunk head is used for required connection

3. The back surface is smooth without protrusion, because the countersunk head can be screwed into the part. The round head can also be screwed into the part. The tightening force of the square head can be larger, but the size is large.

4. In addition, in order to meet the need of locking after installation, if there are holes in the head and the rod, these holes can prevent the bolt from loosening when it is vibrated.

5. The polished rod of some bolts without threads should be made thin, which is called thin waist bolt. This kind of bolt is beneficial to the connection under variable force.

6. There are special high-strength bolts on the steel structure, the head will be larger, and the size will also change.

7. In addition, there are special uses: T-groove bolts are used, and most of them are used on machine tool clamps. The shape is special, and both sides of the head should be cut off. Anchor bolts, which are used to connect and fix the machine and the ground, have many shapes. U-bolt, as described above. wait.

8. There are also special studs for welding, with threads at one end and no threads at the other end, which can be welded on the parts, and the nuts can be directly screwed on the other side

    Wuhan Xincheng Metals Minerals Trade Co,Ltd.(Former  Wuhan Hengsheng Trade Co.,Ltd.) is a international trade company specialized in Import & export which was established in 2005.

    Our company locate in  Wuhan city,Hubei--beside of the third longest river,the Yangtse River,and it's also well known of its well connected traffic as well as the important traffic hub of China

   With years of developing,our export & import volume increasing firmly and annually,cover more and more products range and International markets.,The major products are:hardware and tools, construction material,automobile parts,covers from nails,steel wire,link-chain,shovel,toolbox,painting brush,garden tools,steel pipe,flange,wire mesh,fiberglass sheet,steel sheet,aluminium sheet,car light and so on.

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    Comply with the current developing trend,there will be new challenges and opportunities each day.The global hardware and construction markets are waiting for us to exploit.Strong human resources,rigorous management and operating idea are our foundation,adding accumulation of experiences and the tireless pursuit of future,continuous innovation in all aspects to provide you better quality,more economic price and practical products,Welcome all friends pay a visit,guidance us and discuss  business with us.

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