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Screw 1/4-20 x 1 Thumb Screw BO (Jar 100)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Screws
- Sub Division:
- Electrical-E H2
- Department:
- Fasteners
- Product Subgroup:
- Machine Screws
- Product Type:
- Thumb Screw
Metallics JTM1BLK – Frequently Asked Questions
1) What thread size is the Metallics JTM1BLK thumb screw, and will it thread into a 1/4-20 tapped hole?
The JTM1BLK is a 1/4-20 thumb screw with a 1 inch length, so it threads into any standard 1/4-20 tapped hole or nut. That is the common thread used on electrical enclosure covers, strut nuts and panel hardware, and the 1 inch shank gives you enough grip for stacked gasket or cover thicknesses.
2) How many Metallics JTM1BLK thumb screws come in a jar?
Each jar of JTM1BLK holds 100 thumb screws, packed in Metallics' jar pack. That is the buy unit, so order by the jar rather than the piece when you are stocking a van or a shop bin.
3) What does the BO finish on the Metallics JTM1BLK thumb screw mean?
BO is black oxide. It is a dark conversion coating rather than a plating, so it adds no measurable thickness and the 1/4-20 threads still run freely in a tapped hole. Black oxide gives mild corrosion resistance and a non-reflective black look, which is why it gets specified where a bright zinc screw would stand out on a panel or fixture.
4) Can I hand-tighten these instead of using a screwdriver?
That is the point of a thumb screw. The JTM1BLK has a thumb head you grip and turn by hand, so covers, guards and access panels can be opened and closed without a tool. Electricians use them where a panel gets opened repeatedly and a dropped screwdriver is a nuisance.
5) Is the Metallics thumb screw suitable for outdoor or wet locations?
Black oxide is a light corrosion coating, not a barrier plating, so a 1/4-20 x 1 black oxide thumb screw is best kept to dry interior work: panel covers, enclosure guards, indoor fixture access. For damp, exterior or washdown locations, step up to a stainless or hot-dip galvanized fastener of the same 1/4-20 x 1 size instead.
6) What part number do I order for the Metallics black oxide thumb screw?
Order Metallics part JTM1BLK. That number covers the 1/4-20 x 1 inch black oxide thumb screw in the 100-piece jar, and it is the only configuration the part number carries, so there is no size or finish to specify on the order.
How fast can I get the Metallics JTM1BLK 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 JTM1BLK come with a warranty?
Absolutely. The Metallics JTM1BLK 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 JTM1BLK?
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product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics JTM1BLK from ZenSupply?
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and
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