Metallics 3501KOSGSS 3-1/2 K/O...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$57.31
$8.49

Metallics 3501KOSGSS 3-1/2 K/O SEAL 316 SS

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Model: 3501KOSGSS

In Stock (leaves warehouse same day if ordered before 3pm ET)

$57.31
$8.49
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3-1/2 K/O SEAL 316 SS

Manufacturer Resources

Product Specs

Division:
Electrical H1
Product Group:
Conduit Accessories
Sub Division:
Electrical-E H2
Department:
Electrical
Product Subgroup:
Plugs and Seals

Metallics 3501KOSGSS – Frequently Asked Questions

1) What size knockout does the Metallics 3501KOSGSS seal close off?
The 3501KOSGSS is sized for a 3-1/2 inch knockout. It plugs an unused 3-1/2 inch opening in a panel, enclosure, box or gutter where a conduit was removed or never installed, closing the hole back up so the enclosure stays sealed.
2) Is the Metallics 3-1/2 inch knockout seal stainless steel, and which grade?
It's 316 stainless steel. Grade 316 is the molybdenum-bearing austenitic stainless that holds up better than 304 against chlorides, so it's the one specified for coastal, wash-down, food processing and chemical areas where a plated steel seal would rust out.
3) I pulled a 3-1/2 inch conduit out of a stainless enclosure. What do I use to close the hole?
A 3-1/2 inch knockout seal like the Metallics 3501KOSGSS is the part for that job. Match the seal material to the enclosure: on a 316 stainless box in a wash-down or marine environment, use the 316 stainless version rather than a zinc-plated steel seal, since dissimilar metals and chlorides are what cause those plugs to corrode and weep.
4) Is the Metallics 3501KOSGSS a conduit fitting or just a filler plug?
It's a filler. The 3501KOSGSS is a knockout seal, not a connector or hub, so nothing threads into it and no conduit lands on it. If you need to bring a 3-1/2 inch raceway into the enclosure, you want a conduit connector or hub instead.
How fast can I get the Metallics 3501KOSGSS 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 3501KOSGSS come with a warranty?
Absolutely. The Metallics 3501KOSGSS 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 3501KOSGSS?
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 3501KOSGSS 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.