ISO 14581 M3.5
Countersunk head screw,hexalobular (Torx) drive
Second-choice sizeSecond-choice size ISO 262 ranks thread sizes by preference. This one is second choice: harder to find and usually dearer. Prefer a first-choice size in new designs.
- Thread M3.5 × 0.6
- Torx bit T15
- Tap drill Ø 2.9 mm
Dimensions and tolerances (mm)




| min | nom. | max | |
|---|---|---|---|
| d | |||
| dk | |||
| k | |||
| T | |||
| A | |||
| t |
Values per ISO 14581:2013. The values follow this edition; the current one is ISO 14581:2022.
In bold: the value shown in the table on the standard page.
Standard threads (mm)
d₂d₃
| P | d₂ | d₃ | |
|---|---|---|---|
| M3.5Coarse (most common) | 0.60 | 3.110 | 2.764 |
Profile per ISO 68-1 · tolerance class 6g
Standard lengths (mm)
Length l measured from the top of the head.
5681012141620253035
All lengths of this size are fully threaded.
Verified data
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References
- ISO 14581:2022 Fasteners — Hexalobular socket countersunk flat head screws (common head style) with reduced loadability
- ISO 262:1998 ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts
- ISO 68-1:1998 ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads