You may also like
Metallics 3/16 x 1-1/4 Inch Quadrive Concrete Screws with 1/4 Inch Head - 100 Pack
Professional Self-Tapping Concrete Fastening Solution
Metallics delivers reliable concrete fastening performance with these 3/16 x 1-1/4 inch Quadrive concrete screws featuring 1/4 inch heads. This 100-piece pack provides professional-grade self-tapping screws designed for secure anchoring in concrete applications. The Quadrive head design ensures optimal torque transfer and reduced cam-out during installation, making these screws ideal for electrical and construction professionals requiring dependable concrete fastening solutions.
Professional Features & Benefits
- 3/16 x 1-1/4 Inch Dimensions: Optimal size for medium-duty concrete anchoring applications with reliable holding power.
- Quadrive Head Design: Advanced drive system provides superior torque transfer and reduces installation tool slippage.
- 1/4 Inch Head Size: Provides adequate bearing surface for secure fastening without over-penetration.
- Self-Tapping Design: Eliminates need for pre-drilling in many concrete applications, saving installation time.
- 100-Piece Pack: Bulk quantity ensures adequate supply for larger projects and reduces procurement frequency.
- USA Manufacturing: Domestic production ensures consistent quality standards and reliable supply chain.
Technical Specifications
- Department: Electrical
- Division: Electrical H1
- Product Family: Electrical Supplies
- Product Group: Fasteners
- Product Subgroup: Screws
- Product Type: Self Tapping Screw
- Sub Division: Electrical-E H2
Installation & Operation
- Mark fastening locations and ensure concrete surface is clean and free of debris or loose material.
- Select appropriate drill bit size if pre-drilling is required for specific concrete types or applications.
- Position screw at marked location and begin installation using compatible Quadrive driver bit.
- Apply steady downward pressure while driving to ensure proper thread engagement in concrete.
- Drive screw until head is flush with surface or to specified torque requirements for the application.
- Verify secure fastening and proper holding strength before applying load to the fastened component.
Professional Applications
- Electrical equipment mounting and conduit support systems
- HVAC equipment installation and ductwork support
- Structural steel connection to concrete foundations
- Utility and telecommunications equipment anchoring
- Commercial and industrial fixture mounting
- Construction and renovation fastening requirements
Why Choose Metallics Quality?
Metallics concrete screws deliver consistent performance through precision manufacturing and quality materials. The USA-made construction ensures reliable supply and adherence to professional standards, while the bulk 100-piece packaging provides cost-effective procurement for contractors and maintenance professionals requiring dependable concrete fastening solutions.
Manufacturer Resources
Product Specs
- Minimum Purchase:
- 100 units
- Division:
- Electrical H1
- Sub Division:
- Electrical-E H2
- Product Type:
- Self Tapping Screw
- Product Group:
- Fasteners
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics QCSH1 – Frequently Asked Questions
1) What drill bit do I use for a 3/16 inch Quadrive concrete screw?
A 3/16 inch concrete screw installs into a 5/32 inch hole drilled with a carbide-tipped masonry bit, and the hole should go deeper than the screw's embedment so dust has somewhere to go. The Metallics QCSH1 is self-tapping, meaning it cuts its own thread in the hole rather than needing an expansion anchor or plastic sleeve. Blow or vacuum the dust out before driving, or the screw will bind before the head seats.
2) Does "self-tapping" mean I don't have to pre-drill concrete at all?
Self-tapping means the screw cuts its own threads in a pre-drilled hole, not that it drills the hole for you in cured concrete. The Metallics QCSH1 description notes pre-drilling with an appropriately sized bit depending on the concrete type. In soft block or mortar joints you may get away with driving it straight in, but in poured concrete, drill first or you will snap heads.
3) What driver bit fits the Quadrive head on these Metallics concrete screws?
These take a Quadrive (square-drive) bit, which is what gives the positive engagement and keeps the driver from camming out under the torque it takes to thread into concrete. Use a bit in good condition and an impact driver or a drill on low speed with steady downward pressure; a worn square bit will round the recess out before the screw seats.
4) Can I use 3/16 concrete screws to anchor conduit straps and boxes to a concrete wall?
That is the main use for them. The Metallics QCSH1 is sold through the electrical line and the stated applications include electrical equipment mounting and conduit support, HVAC and ductwork support, utility and telecom equipment anchoring, and general commercial fixture mounting. For strap, strut hanger, and box-bracket work on concrete or block, a 3/16 screw at this length is the normal choice.
5) What is the head size, and will it hold a slotted strap without pulling through?
The head on the QCSH1 measures 1/4 inch, which gives a bearing surface wider than the 3/16 shank so it bridges standard strap and bracket slots instead of sinking into them. Drive until the head is flush against the fixture; do not keep torquing past that, since over-driving a concrete screw strips the thread it just cut and you lose the pullout you were trying to get.
6) How many screws come in a pack of Metallics QCSH1?
100 pieces per pack, which is sized for a full day of strap and bracket work rather than a single repair. Metallics makes them in the USA.
7) Can I reuse the same hole if I back a concrete screw out?
Driving a replacement screw into a hole a concrete screw has already cut gives you much less holding power, because the first screw formed the threads and backing it out damages them. If you have to remove the Metallics QCSH1 and refasten in the same spot, drill a fresh hole beside it rather than re-driving into the old one.
How fast can I get the Metallics QCSH1 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 QCSH1 come with a warranty?
Absolutely. The Metallics QCSH1 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 QCSH1?
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 QCSH1 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.