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Manufacturer Resources
Product Specs
- Number Of Batteries:
- 0
- Product Type:
- Locknut for Conduit Fitting
- Department:
- Electrical
- Product Group:
- Conduit & Fittings
- Product Subgroup:
- Conduit Bodies
- Product Type2:
- Locknut for Conduit Fitting
- Product Size:
- 1-1/2 Inch
Steel City LG 405 – Frequently Asked Questions
1) What size conduit does the Steel City LG 405 grounding locknut fit?
The LG 405 is a 1-1/2 inch grounding locknut, so it threads onto 1-1/2 inch rigid or IMC conduit and matching fitting hubs. Get the trade size right before ordering, since a locknut only threads onto the size it was cut for.
2) Will the Steel City LG 405 work on EMT?
No. The LG 405 is threaded for rigid and IMC conduit, which are the threaded raceway types. EMT is not threaded, so it lands in a box with an EMT connector instead, and you would use a grounding locknut sized to that connector's hub thread rather than this one on the conduit itself.
3) What is the difference between a grounding locknut and a standard conduit locknut?
A standard locknut just clamps the conduit or connector to the enclosure wall. A grounding locknut like the 1-1/2 inch LG 405 adds a lay-in or set-screw grounding provision so you can land a bonding conductor at the entry, which is what you want on a concentric or eccentric knockout or anywhere the box connection alone can't be relied on for the bonding path. If you don't need a bonding conductor terminated there, a plain steel locknut is the cheaper part.
4) Is the Steel City LG 405 locknut steel or zinc die cast?
Steel. The LG 405 is a steel-bodied grounding locknut, which is what most commercial and industrial specs call for on rigid and IMC runs rather than a die cast body.
5) Do I need one or two locknuts per conduit entry with the LG 405?
That depends on the entry. With a threaded rigid or IMC nipple through a knockout you typically run a locknut inside and outside the enclosure, and only one of them needs to be the grounding type, the LG 405, to land the bond wire. Where a fitting hub with a shoulder seats against the outside of the box, a single locknut inside is the usual arrangement. Order the count for your job accordingly, since the 1-1/2 inch LG 405 is a single locknut.
6) Does the Steel City LG 405 come with a grounding screw or bonding jumper?
The LG 405 is supplied as the grounding locknut itself, with its integral grounding provision. The bonding jumper wire is a separate buy, and you size it to the circuit per your grounding schedule.
How fast can I get the Steel City LG 405 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 Steel City LG 405 come with a warranty?
Absolutely. The Steel City LG 405 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 Steel City LG 405?
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 Steel City LG 405 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.