Product Name: UNC Coarse Inch Simple Plain Nuts /Unified coarse pitch threads(UNC)
Dimensions: 1 / 4-20 UNC * 5 / 16-18 UNC * 3 / 8-16 UNC-7 / 16-14 UNC * 1 / 2-13 UNC * 1 / 2-12 BSW
These nuts belong to the family of simple nuts, with the difference being that the serrations of these nuts are 55 degrees and the numbers of serrations are counted per inch, depending on whether they are small or coarse.
The most commonly used nuts in the industry are hexagonal nuts that are bent/beveled at an angle of 30 ° (all around) for better and easier engagement with the wrench.
Inch triangular tooth nut (whitworth):
In these nuts: All sizes, such as outer diameter, inner diameter, and steps are about inches.
The geometrical shape of the indentation is in the shape of a triangle equal to the arc of the indentation.
The angle of the thread or tooth is 55 ° and is made in the two styles of coarse or fine.
The nut UNC 1 / 2-13 means its outer diameter is 1/2 inches and the number of teeth per inch is 13
The nuts are used to attach the screws to other objects and the majority of nuts are shaped like hexagons.
So, in other words, a hexagon nut is a kind of nut that has six angles or is in the shape of a hexagon.
While these are the most popular types of nuts, there are many other types of nuts ever made that each has a specific use, but it can be said that hexagons are used almost everywhere and are the most useful ones.
It is not possible to say exactly when this nut was first used, but historians believe it was first produced in a small French factory. Production of hexagon nuts began in the year 1568 by a factory called Besson. These nuts were used in carriages and chariots at the time, while at the same time, hand-made Wing nuts were made in North America for this purpose.
Later in the year Micah Rugg invented the first nuts and bolts machine in one of the US states. Since the invention of the first bolt, many manufacturers have been looking for ways to expand the nuts and bolts system.
Today, due to their practicality, hexagonal nuts are the most widely used than other nuts. Hexagon nuts are mostly made of steel.
The most important uses of these types of nuts are places with lots of dust where the joints do not require sealing.
Application: Automotive, Oil & Gas Industries, Petrochemicals, Construction, Electronics, etc.
It should be noted that the above simple nuts are manufactured with various coatings including cold galvanized coating and hot galvanized coating.
Simple nut material:
Simple nuts are made of carbon steel (low carbon). Their current grades are 10, 8, 6, 5.
Standards of UNC:
There are different standards for this nut, but the most common ones in the production of current simple nuts are UNC threads according to ANSI