Various nuts, bolts and screws.
Thread angle is a measure of the degree of angle between the individual threads of a bolt. These threads consist of teeth or cuts made in the shank of a screw or stud. By cutting the teeth at an angle, fabricators can increase the holding power of the screw. Changes in the angle of the thread also determine how easily the screw can be installed into certain types of material. Based on these factors, contractors consider the angle when choosing screws to find the best types of fasteners for each application.
Most screws with a V-shaped thread design cut at a 60-degree angle to each other.
Many types of screws are cut at a standard angle, which is based on industry standards for this type of fastener. For example, most screws with a V-shaped thread design are cut at a 60-degree angle to each other. This is true of all bras worn in the United States. and the UK, as well as any other country that relies on the Unified Threading Standard or UTS. This 60 degree angle is often identified by the letter M, which is found on screw packaging and in screw identification charts. A 60 degree angle was chosen because it provides a balance of holding power and ease of installation for a large number of projects.
Most metal and plastic pipes feature a 55-degree thread angle, which serves as the industry standard for pipes under UTS. These tubes feature an angle identification of G, which is associated with an angle of 55 degrees. Some specialty screws and fasteners may also use a 55-degree angle, which is based on the traditional Whitworth screw identification system. These fasteners are identified by the letter W and may include bolts and nuts used on bicycles and some specialty vehicles.
Screws with a rounded or hinged thread design are typically angled at 30 degrees. This shallow angle is also used on Acme or square tooth wires, as well as trapezoidal wires. Reinforcing wires, which have one square side and one sloped side, are typically angled between 30 and 45 degrees. All fasteners with fully square threads are considered to have a zero angle.
Users can measure the angle of the thread using a special tool known as a micrometer. You can also calculate thread angles based on other bolt measurements, such as thread diameter or number of threads per inch. Based on this information, screw manufacturers can determine how many threads are needed and where to make cuts along the shank to obtain the desired angle.