Name: Sigma ProConnex Rigid Fittings 3/4-in Rigid / IMC / Zinc-plated steel Conduit Locknut 2 -Pack
Brand: Sigma ProConnex
SKU: 1100175
Price: 1.18 USD
Availability: InStock
Rating: 4.8 (740 reviews)

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The Sigma ProConnex Conduit Locknuts are used for securing Rigid conduit, IMC and other threaded connectors to a steel outlet box or metal enclosure. These zinc-plated steel locknuts are recommended for indoor applications.

Secures threaded conduit or connectors to a box or enclosure
Compatible with 3/4-in Rigid conduit, IMC and other threaded connectors
Easy to install
Zinc-plated steel construction
Includes 2 pieces per bag

General
Type	Locknut	Sub Type	Conduit
Use Location	Indoor/Outdoor	Package Quantity	2
Material	Zinc-plated steel	Series Name	Rigid Fittings
Package Contents	2 per bag

Dimensions
Height (Inches)	1.25	Length (Inches)	1.39
Trade Size in Inches	3/4-in	Width (Inches)	0.1

Features
Corrosion Resistant	Yes	Weatherproof	No
Fire Resistant	No	Rust Resistant	Yes
Weather Resistant	No

Compatibility
Schedule 80 PVC Compatible	No	Flexible Metal Conduit Compatible	No
Schedule 40 PVC Compatible	No	Rigid Metal Conduit Compatible	Yes
Intermediate Metal Conduit Compatible	Yes	Galvanized Rigid Conduit Compatible	Yes
Electrical Metal Tubing Compatible	No	Liquid-tight Conduit Compatible	No

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	Not safety listed

Warranty
Warranty	None

Miscellaneous
UNSPSC	39131700

Check out the Best Selling Conduit Fittings on Lowes.com

Review

4.8 out of 5

740 Reviews

98% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

What Customers Are Saying

Customers overwhelmingly praise these lock nuts for reliable performance, solid build quality, and perfect fit across applications. Most highlight that the nuts work exactly as intended, securing conduit to panels and fittings flawlessly. Reviewers consistently note smooth threading on metal and PVC conduit in 1/2", 1", and 1-1/4" sizes, clean threads without burrs, and a tight fit that prevents loosening. Many appreciate the ease of installation and intuitive design that allows quick completion without complications. Overall, customers consider this product excellent value for its durability and consistent, dependable performance.

Customer review summary generated by AI, including incentivized reviews.

740 Customer Reviews

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Threads

Would Not Recommend

Threads are two large or loose fit, it cross-threaded with mating fitting.

BubbaSeptember 30, 2026
From Rigid Fittings 1-1_SLASH_4-in Rigid _SLASH_ IMC _SLASH_ Zinc-plated steel Conduit Locknut 2 -Pack Verified Purchaser

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Just What Was Needed

This ring is exactly what was needed to complete the Code required Emergency Disconnect installation needed to finish the project.

LoriSeptember 30, 2026
From Rigid Fittings 2-in Rigid _SLASH_ IMC _SLASH_ Zinc-plated steel Conduit Locknut 2 -Pack Verified Purchaser

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COMPARE PRODUCTS

		Name	Current Item Sigma ProConnexRigid Fittings 3/4-in Rigid / IMC / Zinc-plated steel Conduit Locknut 2 -Pack
		Ratings	740
		Type	Locknut
		Material	Zinc-plated steel
		Trade Size in Inches	3/4-in
Sigma ProConnexRigid Fittings 1-1/4-in Rigid / IMC / Zinc-plated steel Reducing Washer 2 -Pack	CANTEX3/4-in 90 -Degree Schedule 40, PVC Elbow Elbow	Sigma ProConnexNM/SE Fittings 3/4-in Die cast zinc Clamp-on type service entrance Connector	Southwire3/4-in Liquid Tight PVC Screw-in Connector	CANTEX3/4-in Schedule 40, Schedule 80 PVC Two-hole Clamp 5 -Pack	Sigma ProConnexNM/SE Fittings 3/8-in Die cast zinc Clamp-on type service entrance Connector 10 -Pack	CANTEX1-in 90 -Degree Schedule 40, PVC Elbow Elbow	Sigma ProConnexRigid Fittings 3/4-in Rigid / IMC / Die cast zinc Offset Nipple	Sigma ProConnexRigid Fittings 1-in Rigid / IMC / Plastic Insulated Bushing
13	920	1280	178	456	1280	897	74	325
Washer	Elbow	Connector	Connector	Clamp	Connector	Elbow	Nipple	Bushing
Zinc-plated steel	PVC	Die cast zinc	PVC	PVC	Die cast zinc	PVC	Die cast zinc	Plastic
1-1/4-in	3/4-in	3/4-in	3/4-in	3/4-in	3/8-in	1-in	3/4-in	1-in