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Can I request unavailable tap sizes?

If you want to request an unavailable tap size, first confirm whether we offer it in any material. You can see all of our tap sizes here: Thread/Tap Hole Size Chart

If we do offer the tap size but you’re unable to add it to a part you want to order, that is typically because the tap is too small or too large for the material thickness. The smallest and largest taps available for each material thickness are listed here: Processing Maximum and Minimum Sizes

Please note: we’re unable to make exceptions to our minimum and maximum tap size limits per material.

If you’d like us to start offering a tap size that isn’t available in any material, please feel free to contact us and submit a request for consideration. We can’t guarantee we’ll be able to add new sizes, but we’re always looking for opportunities to improve our services!

Threaded Holes

For more tapping guidance, take a look at our tapping articles!

In Summary:

Can I request unavailable tap sizes?

We’re unable to make exceptions to our minimum and maximum tap size limits per material. However if you’d like us to start offering a tap size that isn’t available in any material, please feel free to contact us and submit a request for consideration.

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Flush Standoff, 4-40, .250" Zinc plus Clear Chromate

SKUSO-440-8
Thread Size4-40 x .250″
Hole size in sheet (+0.003/-.0.000).168″
Minimum sheet thickness0.040″
Maximum sheet thickness.125″
Fastener materialSteel
Minimum distance hole C/L to edge0.230″
When determining the distance between two or more fasteners, you can calculate the distance by the formula, C/L to edge + 1/2 the diameter of the second mounting hole..314″
Recommended panel materialSteel/Aluminum
Coating typeZinc
Length.250″
Aluminum material ranges (5052, 6061, 7075)0.040″-0.125″
Steel material ranges (CRS, HRPO, HR)0.048″-0.119″