A Threaded Insert is like a blind rivet with a thread at one end. At the other end is either a flat flange or a small countersunk/rimless flange and a portion of plain barrel. It is the plain barrel part that can be crushed up around the sheet metal, thereby forming a nut like fitting fixed through the parent sheet metal with the threaded portion on the rear face of the material. The Threaded Insert Tool that does this can be hand operated or in production cases, it is normally air operated.
At present Anzor only carries standard metric threads like M4 then followed by the length. This is denoted in brackets as the thickness range that the insert will pull up on. This has to match the thickness of the sheet-metal you are putting the insert into. This thickness range is often called the draw or grip thickness. A range of metric standard coarse threads from M3 through to M10 is available.
The large flat flanged range is called a Flanged Threaded Insert and the smaller countersunk type is called Rimless Threaded Insert due to its very small top flange. Both styles are available as stainless steel threaded inserts and aluminium threaded inserts. The Flanged style is also available Nylon Threaded Insert with a nylon body fitted with an aluminium threaded portion. Other materials are also available on request.
They are mainly used in sheet metal fabricated products, such as air conditioning ducting, light fittings, electrical distribution boxes. The uses are varied but limited to sheet metal. The nylon types are usually employed in electrical situations where no conductivity is desired.
The advantages of using threaded inserts are ease of use, quick, permanent, and actually increases the strength of the fastening in the sheet metal. However special tools and drilling is required to fit the Threaded Insert and care and attention should be taken to ensure the correct use of the tool, staff can supply you with an instruction manual.
The Insert may rotate after being done up, especially if the fastening seizes in the thread, the use of a lubricant will help to avoid this. Very widespread use throughout Sheet metal, Electrical and General engineering industry. Relatively easy to use, but special tools and some training required.
We also have a range of wood inserts which consist of a course thread on the outside of an internally threaded body. The course external thread is designed for screwing into wood, and the internal thread is a machine thread which a bolt, machine screw, socket screw or stud can be screwed into.
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