Internal threads are threads inside of a hole in something.
Like a nut, for instance.
External threads are threads on the outside of a cylindrical object.
Like a bolt, for instance.
hth, Steve
The tool for cutting internal threads is called a tap. A tool for cutting external threads is called a die.
You need an internal thread chaser to do it. They come in a set with the external thread chaser.
A pipe fitting that has both external and internal threads is called a "coupling." Couplings are used to connect two lengths of pipe, with one end having female threads (internal) to receive a male threaded pipe and the other end having male threads (external) to connect to another fitting or pipe. This design allows for versatile connections in plumbing and piping systems.
Google the following: "tap and die"
Internal threads, found inside holes, provide a secure connection and are typically less prone to damage since the external environment doesn't wear on them. They are often easier to assemble in confined spaces. Conversely, external threads are easier to manufacture and can be used in a wider range of applications. However, they may be more susceptible to wear and damage over time due to exposure.
Taps and dies are are tools for cutting threads in metal. A tap is a bolt like tool for making for making female threads ,a die is a nut liked tool for making male threads. They are used for cutting internal and external threads
IPS- Iron Pipe Size (Threaded Pipe) Standard pipe threads. Female IPS is internal pipe threads, male IPS are external pipe threads. Also known as "NPT" or "NPS". CC- Copper Connection (Soldered, aka Sweat Connection)
The hole that you put a screw into is referred to as a "tapped hole". The rib-like things in the hole are called "threads" or, more specifically, "internal threads" as opposed to the external threads on a screw.
No... threads can't be produced by forging..
They can have problems related to corrosion because of the heat and the differences in metal between the exhaust system and the case metal on the sensor.
The difference between M8 x 1.25 6g and M8 x 1.25 6h thread gauges lies in their tolerance classes. The "6g" designation indicates a medium external thread tolerance for male threads, while the "6h" designation refers to a medium internal thread tolerance for female threads. This means that a 6g gauge will fit into a 6h gauge with a specific amount of play, ensuring proper engagement between male and female threads in assembly.
A thread rolling machine is used to cut external screw threads on round metal bars to take the internal screw thread of a nut (as in a nut and bolt).