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Cantex 5133690 4-1/8" Junction Box with 1/2" Knockout and Cover
The Cantex 5133690 is a 4-1/8" electrical junction box featuring a 1/2" knockout (KO) and a matching cover, designed to provide a secure enclosure point for conductor splices, taps, and device terminations. Sized for compact wiring applications, this box accepts a 1/2" conduit connection through its factory-punched knockout, simplifying rough-in and reducing on-site fabrication time. As part of the Cantex CTX product line, this junction box is built to deliver dependable performance for both new construction and retrofit electrical work where a low-profile, easy-to-install enclosure is required.
Key Features
- Box Size: 4-1/8" overall footprint provides a compact enclosure suitable for tight installation spaces.
- Knockout: 1/2" knockout (KO) allows for direct conduit entry without additional drilling or reaming.
- Included Cover: Ships complete with a matching cover for a finished, enclosed installation.
- Simplified Rough-In: Pre-formed knockout and integrated cover reduce installation steps and labor time on the jobsite.
- Series Construction: Part of the Cantex CTX series of electrical enclosures engineered for consistent fit and function across the product line.
Technical Specifications
- Box Size: 4-1/8"
- Knockout Size: 1/2"
- Cover: Included
- Series: CTX
Typical Applications
- Junction and Splice Point Enclosures
- Conduit Wiring Systems
- New Construction Electrical Rough-In
- Renovation and Retrofit Wiring Projects
- Device and Termination Access Points
Why Cantex?
Cantex builds electrical enclosures and boxes designed for straightforward installation and dependable long-term service in demanding jobsite conditions. The 5133690 junction box's pre-sized 1/2" knockout and included cover reflect Cantex's focus on reducing installation complexity for electrical contractors. Choose Cantex for enclosure solutions built to keep your wiring projects on schedule and code-compliant.
Manufacturer Resources
Product Specs
- list_batch:
- CAN-20260924
- Product Type:
- Junction Box
- Series:
- CTX
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Size:
- 4-1/8"
- Product Group:
- Boxes & Enclosures
Cantex 5133690 – Frequently Asked Questions
1) Does the Cantex 5133690 junction box come with a cover, or is that ordered separately?
The cover ships with it. The Cantex 5133690 is supplied as a 4-1/8 inch junction box with a matching cover, so you are not sourcing a separate lid to close out the splice point.
2) I need a junction box with a 1 inch conduit entry instead of 1/2 inch - what should I use?
The Cantex 5133690 comes with a factory-punched 1/2 inch knockout, so it is sized for 1/2 inch conduit entry. If the run calls for 1 inch conduit, the Orbit 4SDB series square deep box is a welded steel box with a 1 inch knockout. Confirm the conduit trade size on your drawing before ordering, since the knockout size is what determines which connector will land in the box.
3) What is the difference between the Cantex 5133690 junction box and the Orbit D4SB square box?
The Cantex 5133690 is a 4-1/8 inch junction box with a 1/2 inch knockout and a cover included, part of the Cantex CTX series. The Orbit D4SB is a 1-1/2 inch deep 4 inch square junction box made of drawn steel and sold in a pack of 100. The main distinctions are material and quantity: the Orbit is a drawn steel box supplied in bulk case quantity, while the Cantex 5133690 is a single box that ships complete with its matching cover, so no separate cover purchase is needed to close it out.
4) I need more volume for several splices than the Cantex 5133690 gives me - what is a larger alternative?
The Cantex 5133690 is a 4-1/8 inch box intended for compact wiring applications and tight installation spaces. Where you need more interior volume for multiple conductor splices, the Carlon E987R is a 6 inch by 6 inch by 4 inch polycarbonate box with a screw-on cover. Both arrive with a cover, but the E987R's larger footprint and depth give you more room to work; verify your box fill calculation for the number and size of conductors entering the enclosure.
5) Is the Carlon E987R a drop-in substitute for the Cantex 5133690?
No. The Carlon E987R is a 6 inch by 6 inch by 4 inch polycarbonate screw-cover junction box, while the Cantex 5133690 is a 4-1/8 inch box. The footprints differ, so the E987R will not land in the same opening or on the same mounting pattern as the 5133690. It is an alternative enclosure rather than a dimensional replacement, and swapping one for the other on a retrofit means re-cutting or re-mounting.
6) Which of these junction boxes come with a cover included?
The Cantex 5133690 ships complete with a matching cover for a finished, enclosed installation, and the Carlon E987R is a screw-cover box. The Orbit 4SDB welded steel square deep box and the Orbit D4SB drawn steel 4 inch square box are catalogued as boxes, so plan on specifying a separate cover or device plate for those when you order.
7) Will the Cantex 5133690 work for both new construction and a retrofit in an existing wall?
Both. It's used as a splice or termination enclosure in new electrical rough-in and in renovation work where a low-profile box is needed, and the pre-punched 1/2 inch knockout means no field fabrication to land the conduit.
How fast can I get the Cantex 5133690 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 Cantex 5133690 come with a warranty?
Absolutely. The Cantex 5133690 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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