Minerallac 40741BFG 3/8 x 1" F...
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Minerallac 40741BFG 3/8 x 1" Fender Washer, Zinc-Plated Steel

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Model: 40741BFG

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

$0.14
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Minerallac 40741BFG 3/8 x 1" Fender Washers, Zinc Plated

The Minerallac 40741BFG Fender Washer is a 3/8" x 1" zinc-plated steel washer engineered to provide broad, stable load distribution wherever a standard washer's bearing surface isn't large enough. Its oversized outer diameter relative to its bolt-hole size makes it a go-to hardware component for electrical installers, contractors, and maintenance technicians who need to spread clamping force across soft, thin, or slotted materials without risk of pull-through or surface damage. The zinc-plated finish adds a layer of corrosion resistance, helping the washer hold up in the demanding conditions typical of electrical, mechanical, and general construction environments. As a small but essential piece of hardware, the 40741BFG is stocked and sold individually to support exact quantity needs on any job, whether it's a single repair or a large-scale installation requiring dozens of matching fasteners.

Key Features

  • Trade Size: 3/8" bolt-hole diameter with a 1" outer diameter, providing an enlarged bearing surface for secure fastening.
  • Durable Construction: Manufactured from steel for reliable strength under mechanical load and repeated tightening.
  • Finish: Zinc-plated coating helps resist corrosion and rust, extending service life in typical job-site and installation environments.
  • Fender Washer Profile: The wide, flat design distributes clamping force over a larger area than a standard flat washer, reducing the risk of the fastener pulling through thin or soft materials.
  • Versatile Compatibility: The 3/8" bolt-hole size fits common 3/8" bolts, screws, and threaded rod used in electrical support, mounting, and general hardware applications.
  • Individually Stocked: Sold as a single component so installers can pull exactly the quantity needed for a job without excess waste.

Technical Specifications

  • Trade Size: 3/8" x 1"
  • Material: Steel
  • Finish: Zinc Plated
  • Product Type: Fender Washer

Typical Applications

  • Electrical Support and Mounting Hardware
  • Conduit and Equipment Bracket Fastening
  • General Construction and Maintenance Repairs
  • Panelboard and Enclosure Mounting
  • Applications Requiring Load Distribution Over Thin or Slotted Material

Why Minerallac?

Minerallac hardware is built for the everyday demands of electrical and construction professionals who need dependable, consistently sized fasteners they can count on job after job. The zinc-plated steel construction of the 40741BFG Fender Washer reflects a focus on durability and corrosion resistance, helping ensure secure, long-lasting connections in the field. Choosing Minerallac means equipping your toolbox with hardware designed to perform reliably in professional electrical and mechanical installations.

Manufacturer Resources

Product Specs

list_batch:
MIN-20260928
Product Type:
Washer
Product Finish:
Zinc-Plated
Department:
Electrical
Product Subgroup:
Electrical Fasteners
Product Material:
Steel
Product Size:
1"
Product Group:
Hangers, Supports & Fasteners
Thickness:
0.047" – 0.080
Outside Diameter:
1
Country of Origin:
China
Inside Diameter:
3/8

Minerallac 40741BFG – Frequently Asked Questions

1) How much bigger is a fender washer than a standard 3/8 flat washer, and when do I need one?
The 40741BFG runs a 1 inch outside diameter on a 3/8 inch hole. A standard 3/8 flat washer is closer to 7/8 inch, so you get noticeably more bearing surface here. Use it when the nut would otherwise pull through or dish the material: sheet metal enclosures, strut slots, slotted brackets, drywall or soft backing, and oversized or elongated mounting holes. If the hole is clean and the material is solid steel, a standard flat washer is enough.
2) How thick is the Minerallac 40741BFG fender washer?
Thickness is specified as 0.047 to 0.080 inch, so roughly 3/64 to 5/64 of an inch. That matters in two places: it is thin enough that stacking one on each side of a strut or bracket will not eat much thread length, and thin enough that it will dish slightly if you over-torque it against an unsupported slot. Account for it when you are figuring usable thread on a cut length of rod.
3) Is a zinc-plated steel washer OK outdoors or in a damp mechanical room?
Zinc plating on steel gives moderate corrosion resistance, which covers indoor electrical rooms, panel and enclosure mounting, and covered or intermittently damp locations. For continuous wet exposure, direct weather, coastal air, or chemical environments, step up to hot-dip galvanized or stainless hardware instead. The 40741BFG is zinc-plated steel.
4) Can I use a 3/8 fender washer to mount a panelboard or enclosure through its sheet metal?
That is one of the uses it is built for. Enclosure and panelboard flanges are thin gauge steel with holes that are often slotted or oversized, and a 1 inch OD washer spreads the clamping load across that sheet instead of concentrating it at the nut face. Put the washer on the sheet-metal side of the joint, and if both sides are thin, use one on each side.
5) What size washer do I need for 3/8 inch strut or Unistrut slots?
For 3/8 inch hardware through a strut slot, a fender washer like the 40741BFG works because its 1 inch outer diameter bridges the slot width where a standard washer can sink into it. Pair it with a 3/8 inch bolt or rod and a nut. Note this is a flat washer only, not a strut nut or channel nut, so you still need the appropriate nut for the channel.
6) Do I get a box of fender washers or a single piece when I order the 40741BFG?
The 40741BFG is sold as an individual washer, so you set the quantity to the piece count the job needs. Order one for a repair or several dozen for a full enclosure or conduit support run; there is no fixed carton break to work around.
How fast can I get the Minerallac 40741BFG 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 Minerallac 40741BFG come with a warranty?
Absolutely. The Minerallac 40741BFG 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 Minerallac 40741BFG?
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 Minerallac 40741BFG from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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