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Manufacturer Resources
Product Specs
- Country Of Origin:
- China (CN)
- Product Group:
- Electrical Boxes
- Product Type:
- Device Boxes, Covers & Accessories
- Product type2:
- Electrical box covers
- Selling Unit Of Measure:
- each
- Standards:
- UL E28688
- Department:
- Electrical
- Product Subgroup:
- Outlet Boxes
- Product Color:
- Silver
- Product Material:
- Stamped Aluminum
Red Dot SJ-31 – Frequently Asked Questions
1) What does the Red Dot SJ-31 round cover actually do on a weatherproof box?
The SJ-31 is a blank jumbo cover for a 4-1/2 inch round electrical box with three hubs. Blank means there is no device opening, so it closes off the box rather than mounting a receptacle or switch. Jumbo refers to the oversize flange, which covers a slightly larger footprint and hides minor wall or box irregularities around the opening. It is a cover only; the box, the device and the gasket are separate items.
2) Will the SJ-31 blank cover fit a 4-1/2 inch round three-hub box from another brand?
The SJ-31 is built to the 4-1/2 inch round three-hub pattern, so it lines up with any box using that standard round configuration and screw spacing. Match the hub count and the round diameter on the box you have; a four-hub or square box takes a different cover.
3) Is the SJ-31 cover metal or plastic, and will it hold up outdoors?
Stamped aluminum, silver finish. Aluminum does not rust, which is why these covers get used on exterior and damp-location boxes. For a weather rated installation you still need the gasket that goes between the cover and the box.
4) Should I order a blank cover or a device cover for my 4-1/2 inch round box?
Pick the blank SJ-31 when the box is being used as a junction or pull point, or when a run is dead-ended and you need it closed and accessible without a device in it. If you are mounting a receptacle, switch or lampholder in that box, you need a cover with the matching device opening instead, not this one.
5) How is the Red Dot SJ-31 sold, each or in a box of several?
It is sold each, so quantity one is one cover. If you are standardizing a fleet of exterior junction boxes across a property, order one per box plus spares.
6) What is the exact part number to order the Red Dot jumbo blank round cover?
Red Dot part number SJ-31. That is the manufacturer number to quote for the 4-1/2 inch round three-hub blank jumbo cover.
How fast can I get the Red Dot SJ-31 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 Red Dot SJ-31 come with a warranty?
Absolutely. The Red Dot SJ-31 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 Red Dot SJ-31?
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 Red Dot SJ-31 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.