You may also like
Washers M5 Int Tooth Lock 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 Zinc
- Product Weight:
- 0.1 lbs
- Product Width:
- 3 in
Metallics JMLWI5 – Frequently Asked Questions
1) What size screw or bolt does the Metallics JMLWI5 internal tooth lock washer fit?
The JMLWI5 is an M5 internal tooth lock washer, so it goes over M5 metric screws and bolts. If your fasteners are imperial (#10-24, 1/4-20), this is the wrong washer, you want an inch-sized tooth lock washer instead.
2) Internal tooth or external tooth lock washer, which should I use on an electrical ground connection?
Internal tooth washers like the JMLWI5 keep the teeth inside the outer diameter, so the bite happens under the screw head and the finished edge stays smooth, which is what you want when the washer sits under a decorative or low-profile head or inside a tight enclosure. External tooth versions give more bite radius and are used where you want maximum grip against a broad bearing surface. Both are lock washers, meaning they resist loosening from vibration rather than spreading load like a flat washer.
3) Are these zinc plated steel washers OK for outdoor or damp locations?
These are steel with zinc plating, which handles indoor panel, box, and fixture work and incidental moisture. Zinc is a sacrificial coating, not stainless, so for sustained wet exposure, coastal air, or washdown areas, specify a stainless internal tooth washer instead.
4) Can I use a lock washer instead of a flat washer under a screw head?
No, they do different jobs. An internal tooth lock washer like the M5 JMLWI5 bites into the head and the mating surface to resist back-off under vibration. It does not spread clamp load over a soft or oversized hole the way a flat washer does. On sheet metal or slotted openings, use a flat washer for bearing and add the tooth lock washer on top of it.
5) How many M5 lock washers come in a jar of Metallics JMLWI5?
100 pieces per jar. The jar pack is the shop-stock format, so one unit covers a cart or van bin rather than a single job. Total weight runs about 0.1 lbs.
6) Will the jar of JMLWI5 washers fit in a standard parts bin or van drawer?
The jar measures 3 x 3 x 2.15 inches, so it drops into most small-parts bins and shallow van drawers without decanting.
7) What is the country of origin on Metallics JMLWI5 washers?
Made in China. If your project carries a domestic-sourcing requirement, this part will not satisfy it.
How fast can I get the Metallics JMLWI5 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 JMLWI5 come with a warranty?
Absolutely. The Metallics JMLWI5 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 JMLWI5?
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 JMLWI5 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.