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Carbon Steel Tap Bottoming Type 9/16-18 (1pc)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Product Family:
- Electrical Supplies
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics 91618CTB – Frequently Asked Questions
1) What thread does the Metallics 91618CTB tap cut?
The 91618CTB cuts a 9/16-18 thread, which is the UNF (fine) pitch for a 9/16 inch diameter. If the hole or rod you are chasing is 9/16-12 coarse thread, this is the wrong tap.
2) What is a bottoming tap used for, and can I start a thread with it?
A bottoming type tap like the Metallics 91618CTB has almost no taper on the lead, so it threads nearly to the bottom of a blind hole. That same short chamfer makes it poor at starting a thread in bare stock. Normal practice is to start the hole with a taper or plug tap, then finish with the bottoming tap.
3) Is the Metallics 9/16-18 bottoming tap carbon steel or high speed steel?
Carbon steel. It is intended for hand tapping and chasing threads in mild steel, aluminum, and similar soft materials. For powered tapping or harder alloys, an HSS tap is the appropriate tool.
4) Can I use this tap to clean up damaged 9/16-18 threads on an existing rod or coupling?
Yes, chasing damaged or paint-filled 9/16-18 female threads is exactly what the 91618CTB is good for, and the bottoming grind lets it reach the full depth of a closed hole. Back it out frequently and clear the chips, since carbon steel taps snap under side load.
5) What size drill do I need before running a 9/16-18 tap?
33/64 inch is the standard tap drill for 9/16-18, giving roughly 75 percent thread engagement. Drilling undersize is the usual cause of a broken carbon steel tap in this size.
6) How many taps come in the Metallics 91618CTB pack?
One tap per pack, supplied in a pouch. If you are tapping a run of holes and want a spare on the truck, order two.
7) Is the Metallics 91618CTB sold as a single model, or do I have to pick a size option?
One configuration only, model 91618CTB. There is no size or finish choice to make, so if your thread is 9/16-18 this is the part number to order.
How fast can I get the Metallics 91618CTB 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 91618CTB come with a warranty?
Absolutely. The Metallics 91618CTB 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 91618CTB?
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 91618CTB 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.