American Fittings GB Insulated...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$4.72
American Fittings GB Insulated Grounding Bushing, Zinc-Plated Alloy Steel with Aluminum Lug

American Fittings GB Insulated Grounding Bushing, Zinc-Plated Alloy Steel with Aluminum Lug

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Model: GB-50BGL

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

$4.72
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American Fittings GB Insulated Grounding Bushing, Zinc-Plated Alloy Steel with Aluminum Lug

The American Fittings GB Insulated Grounding Bushing is a spec-grade industrial fitting engineered to deliver secure, code-focused grounding and bonding connections in conduit systems. Constructed from zinc-plated alloy steel with an integrated aluminum grounding lug, this bushing family is available in trade sizes from 1/2" to 4" to match a wide range of conduit and enclosure applications. As a grounding accessory, it is designed to provide a dependable bonding point between conduit and equipment grounding conductors across industrial, commercial, and utility electrical systems. The insulated throat design helps protect conductor insulation during wire pulls, making it a dependable choice for commercial and industrial electricians who need a rugged, long-lasting grounding solution.

Key Features

  • Trade Size Range: Available in 1/2", 3/4", 1", 1-1/4", 1-1/2", 2-1/2", 3", and 4" trade sizes to fit a broad range of conduit systems.
  • Durable Construction: Zinc-plated alloy steel body resists corrosion and provides long-term mechanical strength in demanding industrial environments.
  • Aluminum Grounding Lug: Integrated aluminum lug provides a reliable termination point for bonding conductors, supporting proper system grounding.
  • Insulated Throat: Insulated construction helps shield conductors from abrasion and damage as wires are pulled through conduit.
  • Spec-Grade Quality: Engineered to spec-grade standards for consistent performance in industrial and commercial electrical installations.
  • Zinc-Plated Finish: Zinc plating adds an additional layer of corrosion resistance for extended service life.

Technical Specifications

  • Product Type: Grounding Accessory

Typical Applications

  • Conduit Grounding and Bonding Connections
  • Panelboard and Enclosure Grounding
  • Industrial and Commercial Electrical Systems
  • New Construction and Retrofit Wiring Projects

Why American Fittings?

American Fittings builds the GB Insulated Grounding Bushing from zinc-plated alloy steel with an aluminum grounding lug to spec-grade standards, giving electrical contractors a dependable component for critical grounding and bonding connections. Whether outfitting a single conduit run or a full industrial installation, this bushing family delivers consistent, code-focused performance across its full range of trade sizes. Backed by consistent manufacturing quality, the GB series is built to help electrical contractors meet grounding and bonding requirements with confidence.

Manufacturer Resources

Product Specs

list_batch:
AMF-20260917
Product Type:
Grounding Bushing
Product Material:
Zinc-Plated Alloy Steel
Product Finish:
Zinc-Plated
Grade:
Spec-Grade
Department:
Electrical
Product Group:
Grounding & Bonding
Product Subgroup:
Grounding & Bonding

American Fittings GB-50BGL – Frequently Asked Questions

1) What trade sizes does the American Fittings GB grounding bushing come in?
The GB insulated grounding bushing is offered in 1/2 inch (GB-50BGL), 3/4 inch (GB-75BGL), 1 inch (GB100BGL), 1-1/4 inch (GB125BGL), 1-1/2 inch (GB150BGL), 2-1/2 inch (GB250BGL), 3 inch (GB300BGL) and 4 inch (GB400BGL). Order by the conduit trade size you are terminating, not by the conductor size.
2) Does the GB bushing come with a lug for the bonding jumper, or do I add one?
The lug is built in. Each GB bushing has an integrated aluminum grounding lug, so you land the equipment grounding conductor or bonding jumper directly on the bushing. No separate lay-in lug or bonding screw needs to be ordered to make the termination.
3) Will an insulated grounding bushing protect THHN during a long conduit pull?
That is what the insulated throat is for. The GB bushing puts an insulating surface at the conduit opening so conductors bear on it rather than on the cut steel edge, which keeps insulation from being abraded as wire is pulled into a panel or enclosure.
4) What is the difference between a grounding bushing and a plain insulated bushing?
A plain insulated bushing only protects the conductors at the conduit end. The GB does both jobs: insulated throat plus an aluminum lug that gives you a bonding point between the conduit and the equipment grounding conductor. If you need to bond a raceway to a panelboard or enclosure, you want the grounding version; if the raceway is already bonded by other means and you just need throat protection, a plain insulated bushing is enough.
5) Can I use the GB bushing on a panelboard knockout to bond the conduit?
Yes, panelboard and enclosure grounding is one of its intended uses. The bushing threads onto the conduit end at the knockout and the aluminum lug accepts the bonding conductor back to the ground bar. It is used the same way on new construction and on retrofit work in existing gear.
6) If I am running 2-1/2 inch rigid conduit into a gutter, which GB part do I order?
Order GB250BGL, the 2-1/2 inch trade size. Size the bushing to the conduit trade size entering the gutter; the aluminum lug then takes your bonding jumper. For 3 inch and 4 inch runs the equivalents are GB300BGL and GB400BGL.
7) Is a zinc-plated steel bushing with an aluminum lug OK in a damp industrial plant?
The GB body is zinc-plated alloy steel, with the plating there specifically to add corrosion resistance and keep mechanical strength in rough industrial service. The lug itself is aluminum. For wet or corrosive process areas, match the fitting to whatever your spec calls out for the rest of the conduit system.
8) Is the American Fittings GB a spec-grade fitting for commercial jobs?
Yes. The GB series is built to spec-grade standards for industrial, commercial and utility electrical systems, so it is the grade of fitting normally called for on a commercial conduit spec rather than a residential-duty part.
How fast can I get the American Fittings GB-50BGL 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 American Fittings GB-50BGL come with a warranty?
Absolutely. The American Fittings GB-50BGL 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 American Fittings GB-50BGL?
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
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