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Washers 7/16 Split Lock St-zn (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Fits Bolt Size:
- 16-Jul IN
- Inside Diameter:
- 16-Jul IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Split Lock
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Zinc Chromate
- Product Length:
- 3 in
- Product Height:
- 2.15 in
- Product Material:
- Steel Zinc
- Product Weight:
- 0.95 lbs
- Product Width:
- 3 in
Metallics JLW178 – Frequently Asked Questions
1) Will a split lock washer hold a bolt tight on a vibrating HVAC or electrical mount?
That is what the split lock design is for. The JLW178 is a helical split-ring washer, so it springs against the nut and the surface to resist loosening under vibration, which is why it gets used on conduit hangers, strut mounts, panel hardware, and air handler and compressor mounts. Metallics lists it for the electrical, plumbing, and heating and air conditioning trades.
2) Are Metallics JLW178 washers plated for damp or outdoor use?
They are steel with a zinc finish, listed as zinc chromate plating. That handles indoor mechanical rooms, damp locations, and ordinary exterior work. For coastal, chemical, or continuously wet exposure, specify stainless steel split lock washers instead of zinc-plated steel.
3) How many washers come in a jar of Metallics JLW178?
100 pieces per jar. The jar pack is the reason crews buy these for the truck or the shop bin: it stays closed, it does not spill in a gang box, and you are not counting loose washers out of a bag. The filled jar runs about 0.95 lbs.
4) Should I use a split lock washer or a flat washer with my 7/16 hardware?
They do different jobs and are often used together. A flat washer spreads the clamping load over a wider area, which matters on soft material, sheet metal, or oversized holes. The JLW178 split lock does not spread load, it keeps the nut from backing off. On a vibrating assembly the common stack is flat washer against the surface, split lock washer, then the nut.
5) Can I standardize a facility's maintenance stock on these Metallics split lock washers?
They are built for that. One jar covers 100 fasteners at the 7/16 size in a single plated steel spec, so an MRO crib can carry one SKU for conduit hangers, equipment mounts, and panel hardware instead of mixed loose stock. Metallics makes them in the matching jar format across the other bolt sizes, so you can stock 1/4 through 1/2 in the same packaging and finish.
6) What is the exact part number to order for Metallics 7/16 split lock washers?
Metallics part number JLW178. The J prefix denotes the jar pack, and the item is a 7/16 split lock washer in zinc-plated steel, 100 to the jar.
How fast can I get the Metallics JLW178 delivered?
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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 JLW178 come with a warranty?
Absolutely. The Metallics JLW178 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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