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1/2 BRONZE SILICONE FLAT WASHER
Manufacturer Resources
Product Specs
- Country Of Origin:
- Taiwan, Province Of China (TW)
- Outside Diameter:
- 1-1/4 in
- Product Group:
- Components & Hardware
- Product Type:
- Flat Washer
- Selling Unit Of Measure:
- each
- Suitable For:
- 1/2 Inch
- Thickness:
- 0.091 in
- Type2:
- Flat washers
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Material:
- Silicon Bronze
Blackburn 50040FW-C – Frequently Asked Questions
1) What bolt size does the Blackburn 50040FW-C flat washer fit?
The 50040FW-C is sized for 1/2 inch hardware, so it seats over a 1/2 inch bolt, stud, or threaded rod. Outside diameter is 1-1/4 inches and the washer is 0.091 inch thick, which is what you use to size the bearing surface against your lug, bus, or channel slot before ordering.
2) Is the Blackburn 50040FW-C washer safe to use with copper and bronze grounding connectors?
Yes. It is silicon bronze, which is the same family of material used on bronze grounding and bonding connectors, so you are not introducing a dissimilar metal at the joint. That is the reason to spec a bronze washer instead of a plain steel one on a ground bus, ground rod clamp, or copper lug connection.
3) Will a 1-1/4 inch outside diameter washer fit inside a narrow ground bar or lug pad?
Outside diameter is 1-1/4 inches, so you need at least that much clear flat area around the 1/2 inch hole. On tight ground bar pads or a lug with a small boss, measure the pad first; if the landing area is under 1-1/4 inches across, the washer will overhang and will not sit flat.
4) Can I use a bronze silicone flat washer outdoors or in a direct-burial ground well?
Silicon bronze is a corrosion-resistant copper alloy, which is why it gets specified for grounding hardware in damp, buried, and exterior locations where a zinc-plated steel washer would rust out. The 50040FW-C is a bronze washer for 1/2 inch hardware in exactly that kind of electrical service.
5) Am I buying one washer or a box of them?
The Blackburn 50040FW-C sells each, one washer per unit. If you are landing multiple 1/2 inch connections on a ground bar, count your joints and order the quantity you need.
6) Is a flat washer like this the right choice, or do I need a lock washer at the connection?
The 50040FW-C is a flat washer, meaning its job is to spread load and protect the mating surface under the nut or bolt head, not to resist loosening. If your detail calls for vibration resistance as well, the flat washer goes against the surface and a lock washer or a locking nut handles the retention on top of it.
How fast can I get the Blackburn 50040FW-C 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 Blackburn 50040FW-C come with a warranty?
Absolutely. The Blackburn 50040FW-C 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 Blackburn 50040FW-C?
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