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BRIDGEPORT FITTINGS Locknut: Steel, 4 in Trade Size - Expansion Set Screw Conduit Couplings
BRIDGEPORT FITTINGSExpansion Set Screw Conduit Couplings

BRIDGEPORT FITTINGS Locknut: Steel, 4 in Trade Size

The BRIDGEPORT FITTINGS Locknut (MPN EC-400) is a steel expansion set screw conduit coupling with a 4 in trade size and 16 in overall length. It features a zinc-plated finish, is rated NEMA, and is designed for rigid…

SKU 3G-OTH-622010

Brand
BRIDGEPORT FITTINGS
Item
Locknut: Steel, 4 in Trade Size
Category
Expansion Set Screw Conduit Couplings
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Technical Specifications

BRIDGEPORT FITTINGS
Manufacturer Part Number
EC-400
Overall Lg
16 in
Trade Size
4 in
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BRIDGEPORT FITTINGS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BRIDGEPORT FITTINGS Locknut (MPN EC-400) is a steel expansion set screw conduit coupling with a 4 in trade size and 16 in overall length. It features a zinc-plated finish, is rated NEMA, and is designed for rigid conduit applications.

Frequently Asked Questions

What is a BRIDGEPORT FITTINGS locknut used for?

This steel locknut (MPN EC-400) secures rigid conduit connections in industrial electrical systems. It is used with expansion set screw couplings to maintain grounding continuity and mechanical support in conduit runs subject to thermal movement.

What are the specifications of the BRIDGEPORT FITTINGS EC-400 locknut?

The EC-400 locknut has a 4 in trade size, 16 in overall length, and is made of steel with a zinc-plated finish. It is rated NEMA and designed for rigid conduit applications. The manufacturer part number is EC-400.

Where to buy BRIDGEPORT FITTINGS locknuts worldwide?

3G Electric supplies the BRIDGEPORT FITTINGS EC-400 locknut to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this rigid conduit coupling component.

How to install a BRIDGEPORT FITTINGS expansion set screw conduit coupling?

Slide the coupling over the conduit ends, align the expansion gap per manufacturer instructions, and tighten the set screws evenly with a screwdriver. Ensure the locknut is seated firmly against the box or enclosure for a secure NEMA-rated connection.

Used in

Common applications for BRIDGEPORT FITTINGS
Industrial electrical grounding — Bridgeport Fittings grounding lug hubs (MCH-075) for RMC/IMC conduit connections in manufacturing plants.
Commercial conduit installation — Bridgeport Fittings self-aligning three-piece threaded couplings (1122-RT) for aligning RMC runs in tight spaces.
Substation grounding — Bridgeport Fittings split grounding bushings (SGBS-38840) for bonding large-diameter conduit to enclosures.
Process facility wiring — Bridgeport Fittings grounding locknuts (162-G) for securing IMC or threaded rigid conduit in corrosive environments.
Infrastructure projects — Bridgeport Fittings three-piece couplings (1130-RT) for 4-inch RMC connections in tunnels or utility vaults.

BRIDGEPORT FITTINGS Products

3G Electric supplies BRIDGEPORT FITTINGS expansion set screw conduit couplings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Locknut: Steel, 3 in Trade Size, 12 in Overall Lg (MPN EC-300). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: cUL Listed.
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Locknut: Steel, 3 in Trade Size, 12 in Overall Lg (MPN EC-300). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: cUL Listed.
Locknut: Steel, 1 1/4 in Trade Size, 7 in Overall Lg (MPN EC-125). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: cUL Listed.
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Locknut: Steel, 1 1/4 in Trade Size, 7 in Overall Lg (MPN EC-125). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: cUL Listed.
Locknut: Steel, 2 in Trade Size, 8 1/2 in Overall Lg (MPN EC-200). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: LEED.
BRIDGEPORT FITTINGS
Locknut: Steel, 2 in Trade Size, 8 1/2 in Overall Lg (MPN EC-200). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: LEED.
Locknut: Steel, 3 1/2 in Trade Size, 14 in Overall Lg (MPN EC-350). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: cUL Listed.
BRIDGEPORT FITTINGS
Locknut: Steel, 3 1/2 in Trade Size, 14 in Overall Lg (MPN EC-350). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: cUL Listed.
Locknut: Steel, 1 1/2 in Trade Size, 7 1/2 in Overall Lg (MPN EC-150). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: RoHS Complaint.
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Locknut: Steel, 1 1/2 in Trade Size, 7 1/2 in Overall Lg (MPN EC-150). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: RoHS Complaint.
Grounding Fitting: Steel, 1 in Trade Size, 6 1/2 in Overall Lg (MPN EC-100). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: RoHS Complaint.
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Grounding Fitting: Steel, 1 in Trade Size, 6 1/2 in Overall Lg (MPN EC-100). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: RoHS Complaint.
Locknut: Steel, 2 1/2 in Trade Size, 10 in Overall Lg (MPN EC-250). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: Rigid; attr27174: NEMA.
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Locknut: Steel, 2 1/2 in Trade Size, 10 in Overall Lg (MPN EC-250). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: Rigid; attr27174: NEMA.
Grounding Fitting: Steel, 3/4 in Trade Size, 6 in Overall Lg (MPN EC-075). Key specifications ��— attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: REACH Compliance.
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Grounding Fitting: Steel, 3/4 in Trade Size, 6 in Overall Lg (MPN EC-075). Key specifications — attr27176: Zinc Plated; attr27173: No; attr27171: Steel; attr27177: EMT; attr27174: REACH Compliance.