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Drill Bit HD Cobalt St 135d SplPt #43 2-1/4" YLW (1pc)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Pouch
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
Metallics HSSCN43E – Frequently Asked Questions
1) What size hole does the Metallics HSSCN43E #43 drill bit make?
It's a wire gauge #43 bit, which cuts a 0.0890 inch hole. Wire gauge numbering runs opposite to fractions, so #43 sits between 5/64 (0.0781) and 3/32 (0.0938) inch. If your print calls out a fractional size, check the decimal before you order, since no fractional bit is an exact match for #43.
2) Is a #43 bit the right tap drill for a 4-40 screw thread?
Yes. #43 is the standard tap drill for 4-40 UNC threads, which is the most common reason this size gets bought. The 135 degree split point helps it start on center in a drilled hole or on round stock without a center punch, which matters when you are drilling a small pilot you then need to tap straight.
3) Will a cobalt drill bit this small hold up in stainless steel?
Cobalt is the reason to pick this one. The HSSCN43E is a heavy duty cobalt high speed steel bit, and cobalt holds its edge at higher heat than plain HSS, which is what you need in stainless, hardened steel, and cast iron. Run it slower with steady feed and cutting fluid; small diameters like #43 snap from flex and heat rather than wearing out.
4) Does the HSSCN43E have a round shank that fits a standard keyless chuck?
It's a straight shank bit, so it chucks into any standard drill or drill press keyless or keyed chuck. No hex shank and no quick change collar, so it won't snap into an impact driver without an adapter.
5) How long is the Metallics HSSCN43E bit, and how deep can it drill?
Overall length is 2-1/4 inches, a jobber length for this diameter. Usable flute depth is less than that since the chuck has to grip part of the shank, so plan on roughly an inch of material depth before you are bottoming the flutes and packing chips. For deeper holes in a panel or enclosure, step down to a longer aircraft length bit.
6) Do I get one bit or a set when I order HSSCN43E?
One bit per order, supplied in a pouch. Electricians and panel builders who drill #43 pilots routinely tend to buy several at a time, since small diameters break long before they dull.
7) Why is the Metallics #43 drill bit yellow?
The yellow finish is a surface coating on the cobalt body and it doubles as a quick way to tell cobalt bits apart from bright or black oxide HSS in a mixed index. It is cosmetic as far as hole size goes; the cutting performance comes from the cobalt steel and the 135 degree split point.
How fast can I get the Metallics HSSCN43E 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 HSSCN43E come with a warranty?
Absolutely. The Metallics HSSCN43E 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 HSSCN43E?
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