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Carbon Steel Tap Taper Type 1/4-20 (1pc)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Product Family:
- Electrical Supplies
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics 1420CTTE – Frequently Asked Questions
1) What thread does the Metallics 1420CTTE tap cut?
The 1420CTTE cuts a 1/4-20 thread, meaning a 1/4 inch nominal diameter with 20 threads per inch in the UNC coarse series. Use it to cut or chase 1/4-20 threads in steel channel, brackets, or enclosures so you can run standard 1/4-20 machine screws or threaded rod hangers.
2) What is the difference between a taper tap and a plug or bottoming tap?
A taper tap, which is what the 1420CTTE is, has a long chamfered lead of several threads so it starts easily and aligns itself in the hole. That makes it the one to reach for on through-holes and on the first pass of any hole. If you need full threads all the way to the bottom of a blind hole, a taper tap will not get you there on its own, and you follow it with a plug and then a bottoming tap.
3) Is the Metallics 1420CTTE carbon steel tap suitable for stainless steel?
It's a carbon steel tap, which is aimed at mild steel, aluminum, and similar soft materials in field electrical work. Carbon steel dulls quickly in stainless or hardened steel, so for those go to a high speed steel tap instead.
4) What size drill hole do I need before running a 1/4-20 tap?
A 1/4-20 thread is normally tapped after a #7 drill, which is 0.201 inch, for roughly 75 percent thread engagement. Drill the hole first, then start the taper tap square to the surface and back it off every turn or so to clear the chips.
5) Can an electrician use this tap to rethread a stripped 1/4-20 hole in a strut or enclosure?
Yes, chasing damaged 1/4-20 threads is exactly what a taper tap is good for. The long lead lets it pick up the existing thread and follow it, cleaning up the damaged portion. On a through-hole in strut or a sheet steel enclosure it will clean the full depth; in a blind hole it will leave the last few threads short.
6) How many taps come in the Metallics 1420CTTE package?
One tap per package, supplied in a pouch. If you are tapping a run of holes on a job and expect to break or dull one, order multiples.
How fast can I get the Metallics 1420CTTE delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics 1420CTTE come with a warranty?
Absolutely. The Metallics 1420CTTE is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics 1420CTTE?
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selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics 1420CTTE from ZenSupply?
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