Set Screws
Set screws are fully-threaded machine screws, typically with a hex head. They are often screwed into a threaded hole and a nut is used to hold ("set") the set screw at a particular height. If you're looking for what Americans refer to as set screws, then please follow this link. It's worth noting that some standards differ for the across-flats dimensions. The dimensions below are (I believe) the standard sizes in the UK.
| Size | AF | AC | T |
|---|---|---|---|
| M2 | 4 mm | 4.6 mm | 1.4 mm |
| M2.5 | 5 mm | 5.8 mm | 1.7 mm |
| M3 | 5.5 mm | 6.4 mm | 2 mm |
| M4 | 7 mm | 8.1 mm | 2.8 mm |
| M5 | 8 mm | 9.2 mm | 3.5 mm |
| M6 | 10 mm | 11.5 mm | 4 mm |
| M8 | 13 mm | 15 mm | 5.5 mm |
| M10 | 17 mm | 19.6 mm | 7 mm |
| M12 | 19 mm | 21.9 mm | 8 mm |
| M16 | 24 mm | 27.7 mm | 10 mm |
| M20 | 30 mm | 34.6 mm | 13 mm |
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