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Washers 5/16 Flat St-zn (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Country Of Origin:
- MUL
- Division:
- Electrical H1
- Field Application:
- Metal to Metal
- Fits Bolt Size:
- 16-May IN
- Inside Diameter:
- Nov-32 IN
- Outside Diameter:
- 16-Nov IN
- Pack Type:
- Jar
- Product Family:
- Electrical Supplies
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Flat Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Zinc Chromate
- Product Length:
- 3 in
- Product Height:
- 2.15 in
- Product Material:
- Steel Zinc
- Product Weight:
- 0.6 lbs
- Product Width:
- 3 in
Metallics JSW74 – Frequently Asked Questions
1) What bolt size does the Metallics JSW74 flat washer fit?
The JSW74 is a 5/16 inch flat washer, so it pairs with 5/16 inch bolts, machine screws, and threaded rod hardware. It ships as a jar of 100.
2) Is the JSW74 washer plated for corrosion resistance?
Yes. It's steel with a zinc finish, listed as zinc chromate. That's a light-duty corrosion coating suited to dry indoor electrical and mechanical work; for sustained wet or exterior exposure, a stainless or hot-dip galvanized washer is the better call.
3) What is a flat washer like the JSW74 actually for on an electrical install?
It spreads the clamp load of a bolt head or nut over a wider area so the fastener doesn't dig into or deform the material underneath. Metallics lists this one for metal to metal applications, which is the usual case in strut, enclosure, and panel mounting. It does not resist loosening from vibration, that's what a lock washer does.
4) Will a 5/16 zinc flat washer work with stainless hardware?
Mechanically yes, but mixing zinc-plated steel against stainless in a damp location invites galvanic corrosion at the joint. The JSW74 is zinc-plated steel, so keep it with plated steel bolts and nuts in dry interior work, and match stainless with stainless where moisture is in play.
5) How many 5/16 flat washers come in a jar of Metallics JSW74?
One hundred per jar. The jar packaging is the reason contractors keep these on the truck, you scoop what you need without the bag splitting in a gang box.
6) How much does a jar of 100 Metallics JSW74 washers weigh?
0.6 lbs for the jar. Useful if you're building out a material list or estimating shipping weight on a multi-jar fastener order.
How fast can I get the Metallics JSW74 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 JSW74 come with a warranty?
Absolutely. The Metallics JSW74 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 JSW74?
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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