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Washers 8--10 X 1/2 Mstr Seal (Jar 100)
Special Features
- Features: Provides an Affordable Alternative to Pre-Assembled Construction Fasteners
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Country Of Origin:
- United States
- Division:
- Electrical H1
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Outside Diameter:
- 2-Jan IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Sealing and Cushioning Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Galvanized
- Product Length:
- 3 in
- Product Height:
- 2.15 in
- Product Material:
- Steel
- Product Weight:
- 0.26 lbs
- Product Width:
- 3 in
Metallics JMSW21 – Frequently Asked Questions
1) What size screws do Metallics JMSW21 master seal washers fit?
The JMSW21 master seal washer is sized for #8 and #10 screws, with a 1/2 inch outside diameter. That covers the common sheet metal and self-drilling screw sizes used on electrical, plumbing and HVAC work, so one jar handles most of the small-fastener sealing on a job.
2) What is a sealing and cushioning washer actually for?
It goes under the screw head to close off the hole and cushion the joint, so water and air do not track down the fastener. The JMSW21 is a steel washer with a galvanized finish, which is why it is used outdoors and in damp locations on electrical, plumbing and HVAC installs rather than as a plain flat washer.
3) Can I use these instead of buying pre-assembled sealing screws?
That is the point of them. Loose master seal washers let you pair the washer with whatever #8 or #10 screw length you already stock, instead of ordering a pre-assembled construction fastener for every length. For an MRO crib that already carries screws in bulk, it cuts the number of line items you have to keep.
4) Is galvanized steel the right choice for exterior conduit straps and equipment mounts?
For general outdoor and damp-location work, yes, galvanized steel holds up and is what most strap and bracket fastening uses. On coastal exposure, pool rooms or anywhere with chlorides or washdown chemicals, specify stainless instead. The JMSW21 is steel with a galvanized finish only.
5) How many Metallics JMSW21 washers come in a jar?
100 washers per jar. They ship in a jar rather than a bag, which is the pack a service van or shop bench can keep open without the contents spilling. Jar weight is 0.26 lbs.
How fast can I get the Metallics JMSW21 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 JMSW21 come with a warranty?
Absolutely. The Metallics JMSW21 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 JMSW21?
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 JMSW21 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.