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SILICONE BRONZE FLAT WASHER 5/16 IN
Manufacturer Resources
Product Specs
- Country Of Origin:
- Taiwan, Province Of China (TW)Japan (JP)Korea, Republic Of (KR)Switzerland (CH)Italy (IT)
- Inside Diameter:
- 7/8 in
- Outside Diameter:
- 5/16 in
- Product Group:
- Components & Hardware
- Product Type:
- Silicon Bronze Flat Washer
- Selling Unit Of Measure:
- each
- Suitable For:
- 5/16 Inch
- Thickness:
- 0.336 in
- Type2:
- Flat washers
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Material:
- Bronze
Blackburn 31040FW-C – Frequently Asked Questions
1) What bolt size does the Blackburn 31040FW-C bronze flat washer fit?
The 31040FW-C is sized for 5/16 inch hardware, so it pairs with 5/16 inch bronze bolts, rods, or studs on a grounding or bonding connection. Its two stated diameters are 5/16 in and 7/8 in, giving you a bearing surface substantially wider than the bolt it sits on.
2) Why use a silicon bronze washer instead of a plain steel one on a ground connection?
Bronze is the material here, and that is the point. On grounding and bonding hardware the washer sits in the same current path as bronze connectors and copper conductors, so matching bronze avoids the dissimilar-metal corrosion you get when zinc-plated steel is bolted against copper alloy in a wet or buried location. The 31040FW-C is a bronze flat washer built for that use.
3) How thick is the 31040FW-C flat washer, and will it stack under a nut in a tight space?
Thickness is 0.336 in, which is heavy for a flat washer and closer to a structural washer than a thin stamped one. Allow for that in your bolt grip length: on a short 5/16 bolt through a lug and a busbar, a third of an inch of washer can be the difference between full thread engagement and running out of bolt.
4) Is the Blackburn 31040FW-C washer sold individually or in a box?
It is sold each. If you are bolting up a run of ground rod clamps or busbar connections, count one washer per bolted joint face and order the quantity you need rather than expecting a bagged pack.
5) What is the manufacturer part number for the Blackburn 5/16 in silicon bronze flat washer?
Order it as Blackburn 31040FW-C. That is the full part number a distributor or counter will cross on, and it identifies the 5/16 inch bronze flat washer specifically rather than another size in the family.
How fast can I get the Blackburn 31040FW-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 31040FW-C come with a warranty?
Absolutely. The Blackburn 31040FW-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 31040FW-C?
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installation tips, and troubleshooting. Contact Us
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