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Carbon Steel Tap Taper Type 1/4-28 (1pc)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Product Family:
- Electrical Supplies
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics 1428CTT – Frequently Asked Questions
1) What thread does the Metallics 1428CTT tap cut?
The 1428CTT cuts a 1/4-28 thread, which is the UNF (fine) pitch for a 1/4 inch fastener, not the coarse 1/4-20. If the screw or rod you are matching is 1/4-20, this tap will not thread it.
2) What is a taper tap used for versus a plug or bottoming tap?
A taper tap like the Metallics 1428CTT has a long chamfered lead, usually around 8 to 10 threads, so it starts square in the hole and cuts gradually. That makes it the tap you begin with, and it is all you need for a through hole. In a blind hole it will not thread down to the bottom, so a plug or bottoming tap is used to finish the last few threads.
3) Can I use this tap to chase threads on an electrical strut or box fitting?
Yes, if the thread is 1/4-28. Electricians commonly use the Metallics 1428CTT to clean up painted, galvanized, or damaged 1/4-28 holes in enclosures, fittings, and channel so a machine screw will run in. Confirm the existing thread pitch first, since a lot of electrical hardware is 1/4-20.
4) What drill size do I need before tapping 1/4-28?
A 1/4-28 thread is normally drilled with a #3 bit (0.213 inch) for about 75 percent thread engagement. Drill, deburr the mouth of the hole, then start the taper tap square and back it off every turn or so to break the chip.
5) How many taps come in the Metallics 1428CTT pack?
One tap, supplied in a pouch. Order per hole set you expect to cut, and keep a spare on the truck, since a small diameter tap like a 1/4-28 snaps if it is forced or run dry.
6) Does the Metallics 1428CTT come with a tap wrench or handle?
The tap ships on its own, one piece in a pouch. You supply the T-handle or adjustable tap wrench that grips the square drive on the shank.
How fast can I get the Metallics 1428CTT 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 1428CTT come with a warranty?
Absolutely. The Metallics 1428CTT 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 1428CTT?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics 1428CTT from ZenSupply?
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and
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