Back Box Coupler

Couplers for back boxes in electrical installations.

THINKWORK 12000 PSI Quick Release Grease Machine Coupler Set Car Repair Tool Automotive Maintenance Tools with 90° Grease Coupler Adaptor for Tight Spaces
Free shipping

THINKWORK 12000 PSI Quick Release Grease Machine Coupler Set Car Repair Tool Automotive Maintenance Tools with 90° Grease Coupler Adaptor for Tight Spaces

4.67.6K sold
$29.98
1pc Heavy-Duty Black Hitch Coupler Lock for Ultimate Trailer Security - Easy Install, Universal Fit, 1/4 Inch Diameter, Anti-Theft and Durable Design

1pc Heavy-Duty Black Hitch Coupler Lock for Ultimate Trailer Security - Easy Install, Universal Fit, 1/4 Inch Diameter, Anti-Theft and Durable Design

1 sold
$9.48
VEVOR Heavy Duty Forged Steel Adjustable Trailer Coupler, 5-Position Channel Bracket Bolt Kit, 2-5/16" Hitch Ball, 15000lb Capacity, Latch Lock Design, Rust Resistant, for SUV Heavy Hauling, Boat Trailers, Pickup Truck Tow Vehicles

VEVOR Heavy Duty Forged Steel Adjustable Trailer Coupler, 5-Position Channel Bracket Bolt Kit, 2-5/16" Hitch Ball, 15000lb Capacity, Latch Lock Design, Rust Resistant, for SUV Heavy Hauling, Boat Trailers, Pickup Truck Tow Vehicles

1 sold
$187.47
VEVOR Heavy-Duty Steel A-Frame Trailer Coupler, Coated Black, Fits 2-in Hitch Ball, 8000lbs Towing Capacity, Latch Lock, Quick Detach, Rust & Corrosion Resistant, Ideal for Pickup Trucks, Campers

VEVOR Heavy-Duty Steel A-Frame Trailer Coupler, Coated Black, Fits 2-in Hitch Ball, 8000lbs Towing Capacity, Latch Lock, Quick Detach, Rust & Corrosion Resistant, Ideal for Pickup Trucks, Campers

3 sold
Limited time deal
$47.63
2-5/16 in Adjustable Channel Mount Coupler, Cast Steel Mechanical Hardware with Easy-Lock Safety Pin, Dual-Bolt Design, Carbide Coat
Free shipping

2-5/16 in Adjustable Channel Mount Coupler, Cast Steel Mechanical Hardware with Easy-Lock Safety Pin, Dual-Bolt Design, Carbide Coat

1 sold
$100.00
Related Searches
Box connectors
Backboxes for sockets
Back button controller
Box organizer
Back accesories
box connector
box stapler
Backbox savers
Back camera
Related Categories
Fasteners & Hooks
Multitools & Accessories
Mechanical Hardware
Backpacks
Hand Tool Accessories
Motorhome Parts & Accessories

Introduction

Back box couplers join conduit or cable runs inside wall-mounted electrical boxes.

  • Threaded or push-in designs create secure, code-compliant connections.
  • Available in metal or PVC to match existing conduit material.
  • Standard sizes fit single-gang and multi-gang back boxes without extra adapters.

Find the correct coupler size for your next wiring project.

FAQs

Measure the inside diameter of your conduit; common sizes are ½ inch and ¾ inch.

No, match the coupler material to the conduit to maintain grounding and corrosion resistance.

Some couplers include an integrated locknut; others require a separate one for a tight seal.

Choose galvanized or UV-rated PVC versions for outdoor or damp-location installations.

Yes, reducing couplers let you step down from a larger conduit to a smaller one inside the box.