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Washers 3/8 Flat St-zn (Jar 1000)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Fits Bolt Size:
- 8-Mar IN
- Inside Diameter:
- 13/32 IN
- Outside Diameter:
- 13/16 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Thickness:
- Flat Washers IN
- Washer Type:
- Flat Washers
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Zinc
- Product Length:
- 4.5 in
- Product Color:
- Silver
- Product Height:
- 7.25 in
- Product Material:
- Steel Zinc
- Product Weight:
- 7.37 lbs
- Product Width:
- 4.5 in
- Product Depth:
- Flat Washers in
Metallics JSW75M – Frequently Asked Questions
1) What bolt size do the Metallics JSW75M flat washers fit?
The JSW75M flat washers are sized for 3/8 inch bolts and threaded rod. The hole measures 13/32 inch inside diameter, which gives the slight clearance you need to drop over a 3/8 inch bolt or rod without binding on the threads.
2) Are these zinc plated washers OK for damp indoor electrical work?
The JSW75M is steel with a zinc finish, silver in appearance. Zinc plating handles normal indoor and dry-location use, including electrical rooms and interior conduit and strut hangers. For sustained wet exposure, exterior rooftop runs, or corrosive atmospheres, specify stainless or hot-dip galvanized rather than commercial zinc plate.
3) Is the JSW75M a flat washer or a lock washer?
Flat washer. It has no split, no teeth, and no spring action, so it spreads load and protects the surface but does nothing to resist loosening. If you need vibration resistance on a 3/8 bolt, pair it with a split lock washer or a nylon insert nut, or use a serrated flange nut.
4) Will the JSW75M match the 3/8 flat washers already on my existing installation?
If what is in place is a standard-pattern zinc plated steel 3/8 flat washer, the JSW75M matches on hole size (13/32 inch), outside diameter (13/16 inch), and finish. Where it will not match is an oversize or fender washer, which has the same hole but a much larger outside diameter, or a USS-pattern washer, which runs wider than 13/16 inch. Measure the OD on one of the existing washers before standardizing a building on this item.
5) How many washers come in the Metallics JSW75M jar, and what does it weigh?
One jar of 1,000 washers, shipping weight 7.37 lbs. The jar itself measures 7.25 by 4.5 by 4.5 inches, which is useful if you are stocking a van shelf or an MRO bin rather than a shop drawer.
How fast can I get the Metallics JSW75M 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 JSW75M come with a warranty?
Absolutely. The Metallics JSW75M 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 JSW75M?
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 Metallics JSW75M 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.