You may also like
Screw 3/4-10 x 3-1/2 SHCS FH St-Blk (Jar 25)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics JFSC34312 – Frequently Asked Questions
1) What size and thread is the Metallics JFSC34312 socket head cap screw?
It's a 3/4-10 x 3-1/2 inch socket head cap screw. The 3/4 inch nominal diameter runs 10 threads per inch, which is the standard UNC coarse pitch for that diameter, and the 3-1/2 inch figure is the shank length under the head. Steel, black finish.
2) Is the black finish on the Metallics JFSC34312 screw suitable for outdoor or wet locations?
No. It's plain steel with a black finish, which is an indoor, dry-location fastener. Black oxide and black-finish alloy cap screws rust quickly once exposed to weather or washdown, so for exterior strut, rooftop mounting, or damp vaults, specify a hot-dip galvanized or stainless cap screw instead.
3) What nut or tapped hole does the Metallics JFSC34312 screw thread into?
Anything cut to 3/4-10 UNC: a 3/4-10 hex nut, a 3/4-10 tapped plate, or a 3/4 inch threaded insert. It will not engage a 3/4-16 fine thread hole, so confirm the pitch on existing tapped steel before you order.
4) How many screws come in a jar of Metallics JFSC34312?
Twenty-five screws per jar. The jar pack is how this 3/4-10 x 3-1/2 cap screw ships, so order in multiples of 25 rather than by the piece.
5) What size hex key do I need to drive a 3/4-10 socket head cap screw?
A socket head cap screw is driven with a hex (Allen) key in the recess, not a wrench on the head. For a 3/4 inch diameter SHCS the standard socket size is 5/8 inch hex. Plan on a hex bit socket with a breaker bar or impact at this diameter, since the screw takes serious torque to seat.
6) Why use a socket head cap screw instead of a hex bolt for electrical equipment mounting?
Clearance. The cylindrical socket head is smaller in diameter than a hex head of the same thread size and is driven from above, so it fits in counterbored holes and tight spots where a wrench can't swing, such as inside enclosures or against adjacent gear. If you have open access and want to run a socket or wrench on the flats, a standard 3/4-10 hex bolt is the simpler choice.
7) How do I order the Metallics 3/4-10 x 3-1/2 socket head cap screw by part number?
Order Metallics part JFSC34312. That number covers the 3/4-10 x 3-1/2 steel socket head cap screw in the black finish, supplied 25 to a jar.
How fast can I get the Metallics JFSC34312 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 JFSC34312 come with a warranty?
Absolutely. The Metallics JFSC34312 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 JFSC34312?
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 JFSC34312 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.