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Drill sizes for self-tapping screws
When using self-tapping screws, it's important to use the correct drill size. The correct diameter depends on the sort and the thickness of the material you're working with. On this page, you find the drill diameters to use in steel, brass and aluminium. All measures are in milimeters. |
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| (mm) | (mm) | (mm) | (mm) |
| steel brass |
alum. | ||
| 2,9 | 0,00 - 0,56 | 2,20 | - |
| 0,56 - 0,75 | 2,25 | 2,20 | |
| 0,75 - 1,38 | 2,40 | 2,20 | |
| 1,38 - 1,75 | 2,50 | 2,25 | |
| 1,75 - 2,50 | 2,60 | 2,40 | |
| 3,5 | 0,00 - 0,56 | 2,60 | - |
| 0,56 - 0,75 | 2,70 | - | |
| 0,75 - 0,88 | 2,70 | 2,65 | |
| 1,00 - 1,25 | 2,80 | 2,65 | |
| 1,38 - 1,75 | 2,90 | 2,75 | |
| 1,75 - 2,50 | 3,00 | 2,85 | |
| 2,50 - 3,00 | 3,20 | 3,00 | |
| 3,00 - 6,00 | - | 3,00 | |
| 4,2 | 0,50 - 0,63 | 3,20 | - |
| 0,63 - 0,88 | 3,20 | 2,95 | |
| 0,88 - 1,13 | 3,20 | 3,00 | |
| 1,13 - 1,38 | 3,30 | 3,20 | |
| 1,38 - 2,50 | 3,50 | 3,50 | |
| 2,50 - 3,00 | 3,80 | 3,70 | |
| 3,00 - 3,50 | 3,90 | 3,80 | |
| 3,50 - 10,0 | - | 3,90 | |
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| (mm) | (mm) | (mm) | (mm) |
| steel brass |
alum. | ||
| 4,8 | 0,50 - 0,75 | 3,70 | - |
| 0,75 - 1,13 | 3,70 | 3,70 | |
| 1,13 - 1,38 | 3,90 | 3,70 | |
| 1,38 - 1,75 | 3,90 | 3,70 | |
| 1,75 - 2,50 | 4,00 | 3,80 | |
| 2,50 - 3,00 | 4,10 | 3,80 | |
| 3,00 - 3,50 | 4,30 | 3,90 | |
| 3,50 - 4,00 | 4,40 | 3,90 | |
| 5,5 | 0,00 - 1,13 | 4,20 | - |
| 1,13 - 1,50 | 4,30 | 4,10 | |
| 1,50 - 1,75 | 4,50 | 4,20 | |
| 1,75 - 2,25 | 4,60 | 4,40 | |
| 2,25 - 3,00 | 4,70 | 4,60 | |
| 3,00 - 3,50 | 5,00 | 4,60 | |
| 3,50 - 4,00 | 5,00 | 4,80 | |
| 4,00 - 4,75 | 5,10 | 4,80 | |
| 4,75 - 10,0 | - | 4,90 | |
A self-tapping screw is a screw that can tap its own hole as it is driven into the material. Some self-tapping screws are also self-drilling, which means that, in addition to the tap-like flute in the leading threads, there is also a preliminary drill-like fluted tip that looks much like the tip of a center drill. These screws combine a thrilling-like action and the fastener installation itself into only one driving motion (instead of separate drilling, tapping, and installing motions); they are thus very efficient in a variety of hard-substrate applications, from assembly lines to roofing. Read all about self-tapping screws, self-drilling screws, sheet metal screws - also called P-K screws and more on: Wikipedia
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We decline all responsibility with regard to errors in the information, in the translation, possible harmfulness of mentioned substances and possible harmful consequences of working with these substances or of following the translated recipes on this website. For more information you read the disclaimer.
copyright © 2023 -
mixandstir.com - all rights reserved