Topaz Lighting 131 Zinc Die-Ca...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.87
Topaz Lighting 131 Zinc Die-Cast EMT Compression-to-Flex Combination Coupling, Screw-In Type

Topaz Lighting 131 Zinc Die-Cast EMT Compression-to-Flex Combination Coupling, Screw-In Type

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Model: TOP-133

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

$0.87
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Topaz Lighting 131 Zinc Die-Cast EMT Compression-to-Flex Combination Coupling, Screw-In Type

The Topaz Lighting 131 Zinc Die-Cast EMT Compression-to-Flex Combination Coupling joins flexible metal conduit (FMC) to EMT conduit in a single fitting, using a compression connection on the EMT side and a screw-in connection on the flex side. Machined from corrosion-resistant zinc die-cast, this combination coupling is available in trade sizes ranging from 1/2" to 1", is UL Listed, and is rated for indoor use, making it a dependable choice for professional electrical installations.

Key Features

  • Trade Size Range: Available in trade sizes from 1/2"-1/2" to 1"-1", accommodating multiple conduit system configurations.
  • Durable Construction: Manufactured from corrosion-resistant zinc die-cast for long-lasting performance in demanding electrical environments.
  • Combination Coupling Design: Compression connection on the EMT side and screw-in connection on the flexible metal conduit (FMC) side for a secure, tool-free transition between conduit types.
  • Smooth Pulling Surface: Interior smooth pulling surface protects wire insulation during pull-through, reducing installation time and effort.
  • No Additional Hardware Required: Requires no screws, clamps, or fasteners to secure the connection, simplifying installation and reducing material costs.
  • Indoor Use: Designed and rated for indoor electrical installations in commercial and residential applications.

Certifications & Compliance

  • UL Listed
  • Suitable for Indoor Use

Technical Specifications

  • Conduit Type: EMT / Flexible (FMC)
  • Connection Type: Compression (EMT) / Screw-In (Flex)

Typical Applications

  • Joining flexible metal conduit (FMC) to EMT conduit in commercial and residential wiring systems
  • Conduit and raceway transition points requiring a combination coupling
  • Indoor electrical panel, junction box, and equipment connections
  • New construction and renovation electrical installations
  • Industrial and commercial electrical raceway systems

Why Topaz Lighting?

Topaz Lighting combination couplings are built from corrosion-resistant zinc die-cast to deliver reliable, code-compliant performance across indoor electrical applications in trade sizes from 1/2" to 1". The compression-and-screw-in design eliminates the need for additional fasteners, streamlining installation while maintaining a secure, professional-grade connection. UL Listed, Topaz Lighting fittings are a trusted choice for electricians and contractors who demand quality and consistency on every job.

Product Specs

Product Type:
Combination Coupling
Conduit Type:
EMT / Flexible (FMC)
Connection Type:
Compression (EMT) / Screw-In (Flex)
Listing:
UL Listed
Department:
Electrical
Product Group:
Conduit & Raceway
Product Subgroup:
Flexible Conduit & Fittings
Product Material:
Zinc Die-Cast
Product Size:
1/2" - 1"

Topaz Lighting TOP-133 – Frequently Asked Questions

1) What does the Topaz 131 combination coupling actually connect, EMT to flex or flex to flex?
The Topaz 131 is a transition fitting between EMT and flexible metal conduit (FMC). One end is a compression connector for the EMT, the other is a screw-in connection that threads into the spiral of the flex. It is not an EMT-to-EMT coupling and not a flex-to-flex coupling, so if both sides of your run are the same conduit type you need a straight coupling instead.
2) Can I use a Topaz 131 EMT-to-flex coupling outdoors or in a wet location?
No. The Topaz 131 combination coupling is rated for indoor use only. For an exterior wall, a wash-down area, or anywhere subject to moisture, use a raintight/concrete-tight fitting rated for that location rather than this one.
3) Can I use the Topaz 131 combination coupling to land AC or MC cable on EMT?
No. The Topaz 131 is built for EMT to flexible metal conduit (FMC), with a screw-in connection on the flex side. For armored or metal-clad cable, the Bridgeport Fittings 4058-DC Mighty-Merge is an EMT to AC/MC transition coupling in zinc, offered 3/4 inch to 1/2 inch.
4) What is the closest equivalent to the Topaz 131 EMT-to-flex combination coupling from another manufacturer?
The Bridgeport Fittings 284-DC is the nearest match in function: it is an EMT to FMC transition coupling in zinc, the same conduit pairing the Topaz 131 handles. The Topaz 131 is zinc die-cast and uses a compression connection on the EMT side with a screw-in connection on the flex side, and is offered in trade sizes from 1/2 inch to 1 inch. Confirm the trade size combination you need on each side before ordering either.
5) I need to transition from rigid conduit to flex, not EMT. What should I use instead of the Topaz 131?
The Topaz 131 is an EMT-to-flexible (FMC) combination coupling, so it is specified for EMT on one side. For an opening where the hard pipe is rigid, the Bridgeport Fittings 290-XS is an EMT/rigid to FMC transition coupling in zinc-plated steel and covers both rigid and EMT on the raceway side.
6) Do I need set screws, clamps, or any extra hardware to install this flex-to-EMT coupling?
No separate hardware. The EMT side is a compression connection and the flex side screws directly into the conduit spiral, so no screws, clamps, or fasteners are needed to make the joint. You will still need a wrench to tighten the compression nut on the EMT side.
7) Is the Topaz 131 combination coupling UL Listed for an inspected commercial job?
Yes, the 131 series EMT-to-flex combination coupling is UL Listed. It is rated for indoor installations in commercial and residential wiring.
8) What else can I use instead of the Topaz 131 to transition EMT to flexible conduit?
A direct equivalent is the Bridgeport Fittings 284-DC EMT-to-FMC transition coupling, also zinc. If your run starts in rigid rather than EMT, the Bridgeport 290-XS handles EMT or rigid to FMC and is zinc-plated steel. Both do the same job of joining EMT to flex in one fitting.
9) What is this coupling made of, and will it hold up in a damp indoor mechanical room?
It is zinc die-cast, chosen for corrosion resistance in indoor electrical environments. Keep in mind the fitting is rated for indoor use, so a mechanical room is fine but an exposed exterior or wet location is not.
10) Will this fitting damage wire insulation when I pull conductors through the transition?
The interior of the 131 coupling is a smooth pulling surface, which is there specifically to protect conductor insulation as it passes through the EMT-to-flex transition.
11) Can I standardize on one part number for all my EMT-to-flex transitions in a building?
Only if your raceway is all one size. The Topaz combination coupling is sold as 1/2 inch (131) and 1 inch (133), so a facility running 1/2 inch homeruns to equipment whips would stock the 131 and add the 133 wherever the raceway is 1 inch. Both are the same zinc die-cast, UL Listed, indoor-rated fitting, so the installation method does not change between sizes.
How fast can I get the Topaz Lighting TOP-133 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 Topaz Lighting TOP-133 come with a warranty?
Absolutely. The Topaz Lighting TOP-133 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 Topaz Lighting TOP-133?
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 Topaz Lighting TOP-133 from ZenSupply?
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