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Carbon Steel Tap Bottoming Type 1/2-20 (1pc)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Product Family:
- Electrical Supplies
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics 1220CTB – Frequently Asked Questions
1) What thread size does the Metallics 1220CTB tap cut?
The 1220CTB cuts a 1/2-20 thread, which is the fine (UNF) pitch for a 1/2 inch fastener rather than the 1/2-13 coarse pitch. If the rod or threaded hole on your job is 1/2-13, this is the wrong tap.
2) What is a bottoming tap used for, and do I need a taper tap first?
A bottoming type tap has almost no lead chamfer, so it cuts threads nearly to the bottom of a blind hole. That short lead also makes it hard to start a hole square. Standard practice is to start the hole with a taper or plug tap and finish with the bottoming tap, which is what the 1220CTB is for: carrying 1/2-20 threads down to the base of a closed hole.
3) Can I use the Metallics 1220CTB to chase damaged 1/2-20 threads on a strut or hanger rod?
Yes, that is a common use. Being a carbon steel bottoming tap in 1/2-20, it will clean up or re-cut existing fine threads in mild steel channel, strut nuts, and rod couplings. Carbon steel cuts mild steel and aluminum fine; for stainless or hardened material you want a high speed steel tap instead.
4) How many taps come in the Metallics 1220CTB and how is it packaged?
One tap per order, supplied in a pouch. If you are stocking a van or a shop crib and want both a taper and a bottoming tap in 1/2-20, you need to order them as separate items.
5) What is the Metallics part number for a 1/2-20 bottoming tap?
Metallics catalogs the 1/2-20 carbon steel bottoming tap as 1220CTB, and that is the number to quote when ordering or matching an existing stock item.
How fast can I get the Metallics 1220CTB 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 1220CTB come with a warranty?
Absolutely. The Metallics 1220CTB 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 1220CTB?
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 1220CTB from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.