1/4-20 UNC Tripod Screw Size
1/4-20 UNC = 6.35 mm diameter, 20 threads per inch (TPI). It is the standard camera tripod mount thread.
Open the interactive Standards & Sizes tool →Key facts
| Diameter | 6.35 mm (1/4 in) |
|---|---|
| Pitch | 20 TPI |
| Thread form | UNC |
| Typical use | Camera tripods (standard) |
Frequently asked questions
What thread is a camera tripod screw?
The standard camera tripod thread is 1/4-20 UNC: 6.35 mm diameter, 20 threads per inch.
Is 1/4-20 the same as M6?
No. 1/4-20 (6.35 mm, inch thread) is not interchangeable with metric M6 (6.0 mm, 1.0 mm pitch).
Related pages
1/4-20 Tripod Screw is part of Standards & Sizes on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
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