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Washers 5/16" Split Lock Gr8 St-zn (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Lock Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Length:
- 3 in
- Product Height:
- 2.15 in
- Product Material:
- Steel
- Product Weight:
- 0.49 lbs
- Product Width:
- 3 in
Metallics JG8LW173 – Frequently Asked Questions
1) What's the Metallics part number and sizing standard for these 5/16 inch lock washers?
Order by MPN JG8LW173 from Metallics. It's an ANSI dimensioned 5/16 inch split lock washer, so inside diameter and thickness follow the inch standard your 5/16 bolts are built to, not a metric M8 call out. Note that M8 is slightly smaller than 5/16, so don't cross substitute.
2) Are these grade 8 lock washers, and does that matter for a 5/16 inch bolt?
Grade 8 steel with a zinc finish. Grade 8 matters when you're torquing a high strength bolt down: a soft washer will flatten and relax instead of holding spring tension, so pairing a Grade 8 washer with a Grade 8 or Grade 5 fastener keeps the joint tight under vibration.
3) Will a zinc plated steel lock washer hold up outdoors or in a damp mechanical room?
Zinc plated steel handles indoor and sheltered damp conditions, which covers most panel, strut, and equipment anchoring work. For direct weather exposure, a pool deck, or coastal work, specify hot dip galvanized or stainless instead, since zinc plating is a thin sacrificial coating.
4) Split lock washer or flat washer plus nylon lock nut, which should I use on electrical mounting hardware?
A split lock washer like the JG8LW173 works under the nut or screw head to resist loosening from vibration, and it reuses well on panel covers and strut connections you may open again. A nylon insert lock nut gives stronger loosening resistance but is single use and adds height. Flat washers do nothing for vibration; they only spread load, so many installers run a flat washer against sheet metal and the split lock against the nut.
5) Do these washers ship with bolts or nuts included?
No. The jar contains 100 split lock washers only. You'll need to order the 5/16 inch bolts, nuts, and any flat washers separately to complete the assembly.
6) Where is the Metallics JG8LW173 washer made?
Country of origin is China. Worth knowing up front if you're on a federal or public job with domestic sourcing language in the spec.
How fast can I get the Metallics JG8LW173 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 JG8LW173 come with a warranty?
Absolutely. The Metallics JG8LW173 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 JG8LW173?
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