Ningbo Tete Electromechanical Co., Ltd.


 > Home > News

Inner six angle board hand cold knowledge


The six angle wrench (Hexagonal Wrench) is the shape of the L type six angle bar, but also with a straight steel bar of the cross section of the six corners fixed in the plastic handle and T.

Usually in combination with a number of different sizes, the use of the six - angle wrench, if the metric used in the British, or the British use of the metric system, will lead to damage to the screw or tool.

Metric: 1.5, 2, 2.5, 3~6, 8, 10, 12, 14, 17, 19, 22, 27mm.

English: 1/16, 5/64, 3/32, 1/8, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8, 1/2, 9/16, 5/3, 3/4in.

In the end where the six angle wrench began?

When it comes to the origin of the six angle wrench, we must start from the inside of the six screws. In some European non English speaking countries, people "Allen key" is called "Unbrako key", the "Unbrako" is actually the earliest in the six corners of the screw brand, by the United States SPS company (Standard Pressed Steel Company) was founded in 1911. SPS previously imported from the United Kingdom a four angle screw, but the price is very expensive, in order to save costs, SPS decided to produce their own. SPS's founder, H. T., in his memoirs, said: "we started trying to do the same as the United Kingdom with a square hole screw, but soon found that this kind of screw in the United States will not be accepted. So we decided to add a hexagon hole to the screw." Hallowell interpretation of the history of this vague, but it is speculated that, in order to avoid the four SPS screws in the patent dispute and made amendments. In short, SPS began to produce this new inner six angle screws, and registered the trademark called "Unbrako", from the "unbreakable" homonym, meaning "unbreakable". After the four corners of the screw gradually replaced the inner corner of the screw to become a new industry standard, widely used in the automotive, aircraft, machinery and furniture manufacturing industries, such as six.

Zhejiang province Ningbo city Yinzhou District town revitalization Road No. 135 chapter