![thread angle](https://upload.wikimedia.org/wikipedia/commons/5/5f/Thread_angle.svg)
The thread angle of a
screw
A screw and a bolt (see '' Differentiation between bolt and screw'' below) are similar types of fastener typically made of metal and characterized by a helical ridge, called a ''male thread'' (external thread). Screws and bolts are used to fa ...
is the included angle between the thread flanks, measured in a plane containing the thread axis.
[.] This is a defining factor for the shape of a
screw thread
A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a ...
. Standard values include:
References
Notes
Bibliography
*.
* {{MachinerysHandbook25e
Screws
Metalworking terminology
Threading (manufacturing)