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Washer 3/8 Belleville Washer Steel Zi (Jar 100)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Washers
Metallics JBW38 – Frequently Asked Questions
1) What bolt size does the Metallics JBW38 Belleville washer fit?
The JBW38 is a 3/8 inch Belleville washer, so it goes over 3/8 inch bolts, rods, or threaded studs. On electrical work that is typically 3/8-16 threaded rod for strut, trapeze hangers, and bonding connections.
2) What is a Belleville washer used for instead of a flat washer?
A Belleville washer is a conical spring washer. It flattens under bolt load and keeps pushing back, so it maintains tension on a joint that would otherwise loosen from vibration or from thermal cycling, which is why they show up on electrical connections and grounding lugs. A flat washer only spreads load, it does nothing to hold clamping force.
3) Is the Metallics JBW38 washer plated for corrosion resistance?
It is steel with a zinc plating. Zinc plate is fine for dry indoor and general interior electrical work. For exterior, wet, or corrosive locations you want a stainless or hot dip galvanized washer instead.
4) How many washers come in a jar of Metallics JBW38?
100 pieces, packed in a jar rather than a bag or box. That is the format most electrical contractors keep on the van or in a shop bin for 3/8 hardware.
5) Can I use a 3/8 Belleville washer on a grounding or bonding connection?
That is one of the common uses for a Belleville. It holds clamping pressure on a lug-to-busbar or lug-to-frame joint as the connection heats and cools, which keeps the contact resistance stable. The JBW38 covers 3/8 hardware, the size most ground lugs and busbar bolts use.
6) Which way does a Belleville washer go on when tightening a 3/8 bolt?
Crown up, against the nut or bolt head, with the flat rim seated on the surface being clamped. The 3/8 JBW38 is a single cone washer, so it only works as a spring if the dome is free to compress. Seating it backwards or stacking it against another washer face defeats the tension it is there to provide.
How fast can I get the Metallics JBW38 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 Metallics JBW38 come with a warranty?
Absolutely. The Metallics JBW38 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 Metallics JBW38?
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installation tips, and troubleshooting. Contact Us
Why buy the Metallics JBW38 from ZenSupply?
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