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CONFAST CSFS Stainless Steel Flat Head Concrete Screw with Drill Bit (Box of 50)
CONFAST CSFS Stainless Steel Flat Head Concrete Screw with Drill Bit (Box of 50) delivers a dependable masonry fastening solution built from 410 stainless steel for corrosion resistance in demanding environments. The 3/16" x 1-1/4" Phillips flat countersunk design seats flush for a clean finished appearance, while the included drill bit speeds installation without a separate purchase. Additional sizes are available from 3/16" x 1-3/4" up to 3/16" x 3-1/4" and 1/4" x 1-3/4" up to 1/4" x 2-3/4" to match a range of masonry fastening applications. Each box contains 50 screws, manufactured in Taiwan and packaged for immediate commercial use.
Key Features
- Multiple Size Options: Available in 3/16" x 1-3/4", 3/16" x 2-1/4", 3/16" x 2-3/4", 3/16" x 3-1/4", 1/4" x 1-3/4", 1/4" x 2-1/4", and 1/4" x 2-3/4" to suit varied masonry fastening depths.
- Reference Screw Size: The 3/16" x 1-1/4" Phillips flat countersunk screw is engineered for precise masonry anchoring.
- Corrosion-Resistant Construction: Manufactured from 410 stainless steel for long-term durability in masonry and outdoor applications.
- Flat Head Countersunk Design: Phillips drive flat head sits flush with the material surface for a clean, low-profile finish.
- Included Drill Bit: Each screw ships with a matching drill bit, eliminating the need to source a separate masonry bit for installation.
- Bulk Box Packaging: Sold in boxes of 50 for efficient bulk purchasing on commercial and contractor projects.
- Manufactured in Taiwan: Produced to consistent quality standards for reliable masonry fastening performance.
Technical Specifications
- Country of Origin: Taiwan
- Box Quantity: 50
- Product Size: 3/16" x 1-3/4"
- Product Size: 3/16" x 2-1/4"
- Product Size: 3/16" x 2-3/4"
- Product Size: 3/16" x 3-1/4"
- Product Size: 1/4" x 1-3/4"
- Product Size: 1/4" x 2-1/4"
- Product Size: 1/4" x 2-3/4"
Typical Applications
- Commercial Construction Projects
- Masonry and Concrete Installation
- Structural Anchoring Applications
- Fixture and Bracket Mounting
- Industrial Facility Maintenance
- Renovation and Remodeling Projects
- Outdoor and Exterior Masonry Work
Why CONFAST Concrete Screws?
CONFAST concrete screws are manufactured from 410 stainless steel and designed with a Phillips flat countersunk head for dependable, flush-fitting masonry fastening. Each screw includes a matching drill bit, and boxes of 50 provide the volume contractors need for commercial and industrial projects. With multiple length and diameter options manufactured in Taiwan, CONFAST fasteners deliver consistent performance across masonry anchoring applications.
Specifications
- Box Qty: 50
- Min. Embedment: 1"
- Thread Type: Hi-Lo
Specifications by Size
| Size | Pull-Out (lbs.) | Shear (lbs.) | Bit Size | Max. Fixture Thickness | Min. Edge Distance | Min. Fixture Hole Ø (Hole Spotted) | Min. Fixture Hole Ø (In Place) | Min. Spacing | Thread Length | UPC |
|---|---|---|---|---|---|---|---|---|---|---|
| 3/16" x 1-1/4" | 360 | 432 | 5/32" | 1/4" | 2-1/4" | 1/4" | 1/4" | 3" | 1-1/4" | 0820274004586 |
| 3/16" x 1-3/4" | 360 | 432 | 5/32" | 3/4" | 2-1/4" | 1/4" | 1/4" | 3" | 1-3/4" | 0820274004593 |
| 3/16" x 2-1/4" | 360 | 432 | 5/32" | 1-1/4" | 2-1/4" | 1/4" | 1/4" | 3" | 1-3/4" | 0820274004609 |
| 3/16" x 2-3/4" | 360 | 432 | 5/32" | 1-3/4" | 2-1/4" | 1/4" | 1/4" | 3" | 1-3/4" | 0820274004616 |
| 3/16" x 3-1/4" | 360 | 432 | 5/32" | 2-1/4" | 2-1/4" | 1/4" | 1/4" | 3" | 1-3/4" | 0820274004623 |
| 1/4" x 1-3/4" | 449 | 540 | 3/16" | 3/4" | 3" | 5/16" | 5/16" | 4" | 1-3/4" | 0820274004661 |
| 1/4" x 2-1/4" | 449 | 540 | 3/16" | 1-1/4" | 3" | 5/16" | 5/16" | 4" | 1-3/4" | 0820274004678 |
| 1/4" x 2-3/4" | 449 | 540 | 3/16" | 1-3/4" | 3" | 5/16" | 5/16" | 4" | 1-3/4" | 0820274004685 |
Manufacturer Resources
Product Specs
- Product Type:
- Flat Head Concrete Screw
- Product Brand:
- CONFAST
- Product Material:
- 410 Stainless Steel
- Country of Origin:
- Taiwan
- Box Quantity:
- 50
- Department:
- Fasteners
- Product Group:
- Concrete Anchors
- Product Subgroup:
- Concrete Screws
- Location Rating:
- Moist
- Base Material:
- Concrete, Block, and Brick
- Product Attribute:
- Male (threaded stud)
CONFAST CSFS316134 – Frequently Asked Questions
1) Are these concrete screws OK for outdoor or wet locations?
They are made from 410 stainless steel, which is what gives them corrosion resistance for exterior masonry and damp interior work. That is the reason to pick the CSFS over a plain carbon steel blue concrete screw on anything exposed to weather.
2) What sizes do the CONFAST stainless flat head concrete screws come in?
Eight sizes across two diameters. In 3/16 inch: 1-1/4, 1-3/4, 2-1/4, 2-3/4 and 3-1/4 inch lengths. In 1/4 inch: 1-3/4, 2-1/4 and 2-3/4 inch lengths. Pick the length so the screw embeds into the masonry past the thickness of whatever you are fastening down, then order that size box of 50.
3) Will a flat head concrete screw sit flush so I can mount a plate or bracket tight to the wall?
Yes. The CSFS uses a Phillips flat countersunk head, so in a countersunk hole or a bracket with a chamfered hole it seats flush with the surface. If the part you are mounting has a flat unchamfered hole, use a hex washer head screw instead, since a flat head will just sit proud of it.
4) What is the difference between the 3/16 inch and 1/4 inch CONFAST concrete screws, and which should I use?
Diameter, and with it holding capacity and hole size. The 3/16 inch is the general purpose size for light fixture, conduit strap, furring and bracket work, and it is the only diameter offered in the short 1-1/4 inch and the long 3-1/4 inch lengths. The 1/4 inch is the heavier of the two for larger brackets and framing connections, offered in 1-3/4, 2-1/4 and 2-3/4 inch lengths. Each box ships with the bit matched to that diameter, so the two are not interchangeable in the same hole.
5) Can I use these for mounting electrical boxes and conduit straps to concrete block?
That's a standard use for them. The CONFAST CSFS is catalogued for electrical work, and the 3/16 inch sizes in 1-1/4 to 2-3/4 inch lengths cover strap, device box and small bracket mounting into masonry. The stainless construction holds up in unconditioned and exterior runs where a plated screw would rust.
6) What drive do I need for CONFAST CSFS concrete screws, and can I run them with a drill?
They take a Phillips driver. Run them on a drill/driver or impact driver after drilling the pilot hole with the included bit. Hold the driver square to the head, a flat countersunk Phillips will cam out if you come in at an angle.
7) How many screws are in a box and can I standardize on one size across a building?
Each box holds 50 screws of a single size, so a property or facilities crew buying for repeat work orders can stock one or two lengths in 3/16 inch and cover most fixture and strap mounting. Mixed sizes mean separate boxes, since the size is the only option on the part and every box carries its own matched bit.
8) Where are CONFAST concrete screws made?
The CSFS stainless flat head concrete screws are manufactured in Taiwan. That matters on jobs with country-of-origin reporting requirements on submittals.
How fast can I get the CONFAST CSFS316134 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 CONFAST CSFS316134 come with a warranty?
Absolutely. The CONFAST CSFS316134 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 CONFAST CSFS316134?
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