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Washers 3/8" 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:
- 2.15 in
- Product Material:
- Steel
- Product Weight:
- 0.76 lbs
- Product Width:
- 3 in
Metallics JG8SW75 – Frequently Asked Questions
1) What bolt size do the Metallics JG8SW75 flat washers fit?
They're 3/8 inch SAE flat washers, so they pair with 3/8-16 or 3/8-24 bolts and threaded rod. SAE pattern means a smaller outside diameter and tighter hole than a USS washer of the same nominal size, so it seats better under a 3/8 bolt head or nut on machined or fabricated steel. If you're spanning an oversized or slotted hole, a USS pattern washer is the better call.
2) Are these Grade 8 washers hard enough to use under Grade 8 bolts?
Yes. The JG8SW75 is a Grade 8 hardened steel flat washer, which is what you want under a Grade 8 or higher strength bolt. A standard low carbon washer will dish or embed at those clamp loads and let the joint relax. Use the hardened washer on the turned side at minimum, both sides on softer base material.
3) Is the zinc plating on these washers OK outdoors?
The JG8SW75 is zinc plated steel, which is a mild corrosion barrier meant for dry indoor and protected work, plus it keeps the parts from rusting in the jar. For sustained outdoor exposure, wet locations, or coastal air, go to hot dip galvanized or stainless. Also keep in mind zinc plated hardened parts should not be mixed with dissimilar metals in wet service.
4) Can I use a 3/8 SAE flat washer with strut channel or a 3/8 inch threaded rod hanger?
For 3/8 inch rod hanging and general electrical support the washer fits the rod size fine, but SAE washers have a small outside diameter. Where you're bearing on strut, sheet metal, or a slotted hole, a wider USS or a strut-specific square washer spreads the load better. Under a nut on a solid steel bearing surface, the SAE Grade 8 washer is the right part.
5) What's the difference between the SAE Grade 8 washer and a plain flat washer of the same 3/8 size?
Size is the only thing they share. The JG8SW75 is hardened Grade 8 material sized to the SAE pattern, so it resists crushing under high torque and has a smaller OD and closer hole fit. A plain low carbon flat washer is fine for trim, covers, and light fastening, but it deforms when you take a Grade 5 or Grade 8 bolt to full torque.
6) Where are Metallics JG8SW75 washers made?
Country of origin is China. Worth knowing up front if you're buying against a spec with domestic sourcing or Buy America language on the job.
How fast can I get the Metallics JG8SW75 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 JG8SW75 come with a warranty?
Absolutely. The Metallics JG8SW75 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 JG8SW75?
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installation tips, and troubleshooting. Contact Us
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