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T-mount

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Optical lenses

You'll want a range of allen wrenches to make sure you have the right size for every particular need. The good news is that just about every tool manufacturer has a range of hex key sets you can purchase.

You can find a chart of the allen wrench sizes from any manufacturer [source: Truini]. The basic range of sizes (although not all sizes are included in all sets) is:

Lens mount

Allen wrenches go by a variety of names (allen keys, hex keys, etc.), and come in a wide variety of sizes and shapes. They come packaged with just about anything that requires assembly too. But using them effectively requires a bit of knowledge about allen wrench sizes.

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Also, if you buy a cheaper set of allen wrenches, the small ones may not be so precise in their measurements, which means they won't work as well (or eventually at all) within their size bolts. Substituting sizes is never recommended, as doing so can lead to a stripped screw head.

CS-Mountlens

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s-mountcamera

Named after the Allen Manufacturing Company that invented it, allen wrenches are "L" shaped tools made of alloy steel designed to work in conjunction with hex screws [source: Alloy Artifacts]. The tool is easy to use and incredibly small, which is why so many furniture manufacturers choose to include them in their packaging.

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C-mount

The S-Mount Lens has a standard mount with a M12X0.5 thread, usually is called “M12 lens”. Because it could be threaded directly into the M12 mount of the PCB (Printed Circuit Board）camera, we also call it “board lens”. It is also called “miniature lens”, as the tiny lens size. Our M12/S-mount lenses include Low Distortion lens, Fisheye lens, Wide Angle lens, Low Light Sensitive lens, Pinhole lens, Automotive lens for various applications.

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The smaller-sized allen wrenches need more maintenance than the larger ones. You can more easily strip the head on a small allen key if you're not careful. So be sure that the hex bolt is clean before you insert the allen wrench and that you've inserted it with all six sides properly aligned [source: Morgan].

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They're made up of a long arm and a short arm, both of which share the same key sizes. Allen wrenches have all sorts of practical applications outside of product assembly, which is why toolboxes aren't truly complete without one or two allen wrench sets, to ensure you're covered for both SAE and metric sizes.