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Carbon Steel Tap Bottoming Type 9/16-12 (1pc)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Product Family:
- Electrical Supplies
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics 91612CTB – Frequently Asked Questions
1) What thread size does the Metallics 91612CTB tap cut?
The 91612CTB cuts a 9/16-12 thread, meaning a 9/16 inch nominal diameter at 12 threads per inch. That is the UNC coarse pitch for 9/16, so it matches standard 9/16-12 coarse bolts and rod used for hanging electrical and mechanical supports.
2) What is a bottoming tap used for, and do I need a taper tap first?
A bottoming tap like the 91612CTB has almost no lead chamfer, so it cuts threads nearly to the bottom of a blind hole. It is not a starting tap. Normal practice is to start the hole with a taper tap, then finish with the bottoming tap to run threads down close to the floor of the hole. If you are threading all the way through a plate or channel, you can usually do the whole job with a taper or plug tap and skip this one.
3) Is the Metallics 9/16-12 tap carbon steel or high speed steel?
Carbon steel. That suits hand tapping and chasing threads in mild steel, strut, channel and enclosure sheet metal. For powered tapping or harder alloys, a high speed steel tap holds an edge longer.
4) How many taps come in the Metallics 91612CTB?
One tap per pouch. The 91612CTB is sold as a single piece, so if you want a full set of taper, plug and bottoming in 9/16-12 you order each separately.
5) Can I use the 91612CTB to clean up damaged 9/16-12 threads in a strut insert or threaded rod boss?
Yes, chasing a damaged 9/16-12 female thread is a normal use for it. Because it is a bottoming type with little chamfer, it will follow existing threads and reach closer to the base of a blind hole than a taper tap can. Thread it in by hand with cutting oil and back it off regularly to clear chips.
6) What part number do I order for the Metallics bottoming tap in 9/16-12?
Order Metallics 91612CTB. That single model number covers the 9/16-12 carbon steel bottoming tap in a pouch, one piece.
How fast can I get the Metallics 91612CTB 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 91612CTB come with a warranty?
Absolutely. The Metallics 91612CTB 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 91612CTB?
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product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics 91612CTB from ZenSupply?
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