Reliable Supplier China Hexagon Head Wood Screws DIN571 with Stainless Steel

Short Description:

Material: carbon steel Q195, Q235 /stainless steel

Size: M6 M8 M10 M12 M16…

Length: 25mm-160mm…

Surface finish: galvanized


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To continually improve the management procedure by virtue in the rule of "sincerely, great religion and good quality are the base of company development", we commonly absorb the essence of associated products and solutions internationally, and regularly build new solutions to meet the calls for of consumers for Reliable Supplier China Hexagon Head Wood Screws DIN571 with Stainless Steel, To better expand market, we sincerely invite ambitious individuals and companies to join as an agent.
To continually improve the management procedure by virtue in the rule of "sincerely, great religion and good quality are the base of company development", we commonly absorb the essence of associated products and solutions internationally, and regularly build new solutions to meet the calls for of consumers for China Screw, Stainless Steel, We've got sufficient experience in producing items according to samples or drawings. We warmly welcome customers from home and abroad to visit our company, and to cooperate with us for a splendid future together.
Screw:

A screw is a type of fastener, in some ways similar to a bolt , typically made of metal, and characterized by a helical ridge, known as a male thread (external thread). Screws are used to fasten materials by digging in and wedging into a material when turned, while the thread cuts grooves in the fastened material that may help pull fastened materials together and prevent pull-out. There are many screws for a variety of materials; those commonly fastened by screws include wood, sheet metal, and plastic.

A screw will usually have a head on one end that contains a specially formed shape that allows it to be turned, or driven, with a tool. Common tools for driving screws include screwdrivers and wrenches. The head is usually larger than the body of the screw, which keeps the screw from being driven deeper than the length of the screw and to provide a bearing surface

Wood screw:

Early wood screws were made by hand, with a series of files, chisels, and other cutting tools, and these can be spotted easily by noting the irregular spacing and shape of the threads, as well as file marks remaining on the head of the screw and in the area between threads. Many of these screws had a blunt end, completely lacking the sharp tapered point on nearly all modern wood screws. Eventually, lathes were used to manufacture wood screws, with the earliest patent being recorded in 1760 in England. During the 1850s swaging tools were developed to provide a more uniform and consistent thread. Screws made with these tools have rounded valleys with sharp and rough threads. Some wood screws were made with cutting dies as early as the late 1700s (possibly even before 1678 when the book content was first published in parts).

Once screw turning machines were in common use, most commercially available wood screws were produced with this method. These cut wood screws are almost invariably tapered, and even when the tapered shank is not obvious, they can be discerned because the threads do not extend past the diameter of the shank. Such screws are best installed after drilling a pilot hole with a tapered drill bit. The majority of modern wood screws, except for those made of brass, are formed on thread rolling machines. These screws have a constant diameter, threads with a larger diameter than the shank, and are stronger because the rolling process does not cut the grain of the metal.


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