You may also like
Washers 7/16 G8 USS Flat St-zn (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Country Of Origin:
- MUL
- Division:
- Electrical H1
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Fits Bolt Size:
- 16-Jul IN
- Inside Diameter:
- 2-Jan IN
- Outside Diameter:
- 1/1/2004 IN
- Pack Type:
- Jar
- Product Family:
- Electrical Supplies
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Wrought Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Zinc Chromate
- Product Length:
- 3 in
- Product Height:
- 3.6 in
- Product Material:
- Hardened Steel
- Product Weight:
- 2.04 lbs
- Product Width:
- 3 in
Metallics JG8WW87 – Frequently Asked Questions
1) What bolt size do the Metallics JG8WW87 flat washers fit?
They are 7/16 inch USS pattern flat washers, so they suit 7/16 inch bolts, screws and threaded rod. USS pattern means a wider outside diameter and a slightly looser hole than SAE pattern, which is what you want when the washer has to spread load across a strut channel, sheet metal, or an oversized hole.
2) Are these Grade 8 hardened washers strong enough to use under Grade 8 bolts?
Yes. The JG8WW87 is a Grade 8 washer made of hardened steel, which is the correct pairing under a Grade 8 (or Grade 5) fastener. A soft commercial washer will dish or embed when a high-strength bolt is torqued down, losing preload; a hardened washer holds its face and keeps the clamp load where you set it.
3) Will a zinc chromate washer hold up in a damp mechanical room or outdoors?
The finish is zinc chromate, which gives decent corrosion resistance for interior electrical rooms, ceiling spaces, and covered exterior work. For continuous wet exposure, direct weather, or coastal sites, step up to hot dip galvanized or stainless instead of a zinc plated washer.
4) How many washers come in a jar of Metallics JG8WW87?
Each jar holds 100 washers. The jar pack is sized for a service van or a gang box, and the whole jar weighs 2.04 lbs, so it is easy to carry loose onto a job without repackaging.
5) Are these flat washers suitable for electrical strut and conduit hanging work?
That is the intended use. Metallics lists the JG8WW87 for the electrical, plumbing, heating and air conditioning trades, so it covers strut and channel mounting, conduit and pipe hangers, threaded rod drops, and panel and enclosure fastening wherever a 7/16 bolt is used.
6) Is this a stamped flat washer or a formed lock washer?
It is a wrought flat washer, meaning a stamped flat disc with parallel faces. It provides bearing area and load spreading only; it does not resist loosening from vibration. If you need anti-vibration holding, add a split lock washer, a serrated flange nut, or a nylon insert lock nut behind it.
7) What is the exact part number to order these 7/16 Grade 8 USS washers by?
Order Metallics part number JG8WW87. That is the single orderable model for the 7/16 Grade 8 USS flat washer in zinc, packed 100 to a jar, and it is the number to quote when matching a submittal or reordering the same item.
How fast can I get the Metallics JG8WW87 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 JG8WW87 come with a warranty?
Absolutely. The Metallics JG8WW87 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 JG8WW87?
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 JG8WW87 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.