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Washers 5/8" Flat SAE Gr8 St-zn (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Country Of Origin:
- China
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Family:
- Electrical Supplies
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Length:
- 3 in
- Product Height:
- 4.57 in
- Product Material:
- Steel
- Product Weight:
- 2.91 lbs
- Product Width:
- 3 in
Metallics JG8SW77 – Frequently Asked Questions
1) What bolt size do the Metallics JG8SW77 flat washers fit?
The JG8SW77 is a 5/8 inch SAE flat washer, so it pairs with 5/8 inch bolts, threaded rod, or anchors. SAE pattern means a smaller outside diameter and a tighter hole than a USS washer of the same nominal size, so it seats closer to the bolt head and is the one to use where the bearing surface is limited. If you need to spread load over a wider area or cover a sloppy hole, a USS pattern 5/8 inch washer is the better call.
2) Are these Grade 8 washers hardened enough for structural bolting?
These are Grade 8 SAE flat washers in steel with a zinc finish. Grade 8 washers are through-hardened, which is what keeps a high strength bolt from embedding into the washer and losing preload under torque. Use them with Grade 8 or equivalent high strength fasteners; a standard low carbon washer under a Grade 8 bolt will deform.
3) Is the zinc plating on these 5/8 inch washers OK for outdoor or wet locations?
Zinc plated steel is a dry to mildly damp duty finish. It handles indoor electrical room, strut, and general MRO work fine, but in direct weather, coastal air, or a wash down area the plating gives up and the steel rusts. For sustained exterior exposure move to hot dip galvanized or stainless 5/8 inch flat washers instead.
4) What is the difference between a Grade 8 washer and a standard flat washer at the same 5/8 inch size?
Size is the same nominal bolt fit; hardness is not. The JG8SW77 is a hardened Grade 8 washer, meant to sit under high strength bolt heads and nuts without dishing. A commercial grade flat washer is soft steel and is fine for light mechanical work, sheet metal, and load spreading on wood, but it will crush under Grade 8 torque values and you lose clamp load.
How fast can I get the Metallics JG8SW77 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 JG8SW77 come with a warranty?
Absolutely. The Metallics JG8SW77 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 JG8SW77?
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 JG8SW77 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.