DIN912 Hexagon Socket Cap Screw M2.5-M20

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Product Description

Product Name	DIN912 Hexagon Socket Cap Screw M2.5-M20
Material	Carbon Steel, Stainless Steel 201/ 304/ 316 or others.
Size	M2.5--M20
Standard Model	DIN ANSI JIS ASTM
Min Order	1000piece/ pieces

Packaging & Shipping

Packing	Inner Box + Carton Box + Pallet or Under Your Requirement
Supply capacity	10000000 piece/ pieces per month
Delivery time	5~20 days after deposit
Export market	Asia, America, Europe, Africa, markets.

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1. Reliable Supplier

2. High Quality

3. Standard Producing Technology

4. Competitive Factory Price

5. Fast Delivery

Product Picture：

DIN912 Hexagon Socket Cap Screw M2.5-M20

Q: The idiom of the screw: Lei Feng: I would like to always make a screw, a person's role, for the cause of the revolution, as a machine on a screw machine as a result of the many screws and fixed, only to become a solid whole, can Run freely, play its great ability to work. Although the screw is small, its role is not underestimated. I would like to make a screw hello forever. Screw to regular maintenance and cleaning, it will not rust. People's thinking is the case, to always check will not go wrong

Q: High-strength screw standard parts of the quality of what data: The other can be based on the corresponding use of the environment, to decide whether to accept or not accepted.

Q: Is the tail screw? If it is mainly used in what place? If not what are they different?: Yes, can be directly set in the material, the basic material on the drilling, mainly used in the steel structure of the color steel tile can also be used for simple construction of thin plate fixed.

Q: Gasket 300HV relative to what material?: For the 140HV level can choose 08F, 08Al and 10, 10F, etc., the surface hardness can reach about 140HV

Q: A general set of screws have a few nuts, bolts, washers?: Different bolt standards have different supporting methods, such as GB1228 big six angle a set of bolts contains 1 bolts a nut, and the gasket, and the shear bolt type is the 1 set of the bolts of a nut, the 1 gasket 1

Q: Why should the screw twist clockwise?: Because the screw on the original flute is the clockwise direction of it

Q: The main meaning is that the design to make some specific requirements to achieve consistency.: Referred to the selection must be selected in the national standard parts, otherwise the changeability does not exist. Speaking of norms nothing less than the following: function according to national standards (strength, rust, shape ....);

Q: Stud that head or nut that ah, I need to have the authority of the provisions of the document, please know that the prawns are told, thanks to!: The main purpose of the elastic cushion is to prevent loosening, which is added at the end of the screw, and the screw nut is arranged on the side of the nut.

Q: What is the invention of the screw?: Screws Today, many things are screwed together. Look around the house, the eyes see all kinds of things - from furniture to food processors, are connected with screws. The spirits were invented more than 2,000 years ago, but less than 500 years for fixing things. The first man who describes the spiral is the Greek scientist Archimedes (about 287 BC - 212 BC). The Archimedean spiral is a huge spiral in a wooden cylinder that is used to raise water from one level to another and irrigate the fields. Its true inventor may not be Archimedes himself. Maybe he just described something that already existed. Perhaps it was the ancient Egyptian craftsmen who had designed it to use the irrigation on both sides of the river. Archimedes spiral in the ancient society are used to raise water, no one considered to change it into a fixed piece. Right: Archimedes spiral is widely used for water. For example, the Romans used it to drain the mine. In the Middle Ages, carpenters used wooden nails or metal nails to connect furniture and wooden structures. In the 16th century, nail workers began to produce spiral nails, these nails can be more firmly connected things. It was a small step from this nail to the screw. At the end of the eighteenth century, screws were quite popular as fixed parts, because at that time a cheap production method had been found. Screwdriver (chisel) appeared in London around 1780 years.

Q: How to remove the broken screw?: When the screw is broken, if a part is exposed, it can be screwed out with the appropriate pliers, or a square nut is welded to the broken screw to screw out the dowel screw.

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