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Tapcon Large Diameter Hex Head Concrete Screw, 410 Stainless Steel
The Tapcon Large Diameter Hex Head Concrete Screw, 410 Stainless Steel is built for secure anchoring into concrete, block, and brick substrates on commercial and residential job sites. This large-diameter concrete screw is manufactured from corrosion-resistant 410 stainless steel and features a hex head design for fast, positive driving with a standard hex driver or wrench. Each screw is sold by the box, with box quantity shown for each size, making it easy to stock the right amount for any project.
Key Features
- Large Diameter Design: An oversized screw diameter is engineered to provide increased holding power when anchoring into concrete and masonry.
- Durable Construction: Manufactured from 410 stainless steel for strong corrosion resistance across a range of job-site conditions.
- Hex Head Drive: The hex head design allows the screw to be driven quickly and securely using a standard hex socket or wrench.
- Concrete Screw Anchor: Threads are designed to bite directly into pre-drilled holes in concrete, block, and masonry.
- Sold by the Box: Packaged and sold by the box, with box quantity shown for each size to suit both job-site and bulk purchasing needs.
Technical Specifications
- Product Material: 410 Stainless Steel
- Product Type: Concrete Screw
- Head Style: Hex Head
- Packaging: Sold by the box; box quantity shown with each size
Typical Applications
- Anchoring Fixtures and Hardware to Concrete
- Masonry and Block Wall Installations
- Commercial and Residential Construction Projects
- Outdoor and Corrosion-Prone Environments
- Renovation and New Construction Anchoring
Why Tapcon?
Tapcon is a recognized name in concrete anchoring, and this large-diameter hex head screw is built from 410 stainless steel for corrosion resistance and long-term durability. The hex head design supports fast, confident installation, while the large-diameter profile is engineered to improve holding power in concrete and masonry substrates. Choose the Tapcon Large Diameter Hex Head Concrete Screw for dependable anchoring performance on your next job.
Specifications by Size
| Size | Part # | Pull-Out (lbs.)* | Shear (lbs.)* | Bit Size | Box Qty | Length ID Code | Max. Fixture Thickness | Min. Edge Distance | Min. Embedment | Min. Fixture Hole Ø (Hole Spotted) | Min. Fixture Hole Ø (In Place) | Min. Spacing | Thread Type | Driver Size | Wrench Size | UPC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3/8" x 2-1/2" (Box of 50) | SLDT-3824 | 1336 | 2108 | 5/16" | 50 | C | 1" | 3" | 1-1/2" | 7/16" | 7/16" | 6" | Hi-Lo | 9/16" | 9/16" | 662520085808 |
| 3/8" x 3" (Box of 50) | SLDT-3830 | 1336 | 2108 | 5/16" | 50 | D | 1-1/2" | 3" | 1-1/2" | 7/16" | 7/16" | 6" | Hi-Lo | 9/16" | 9/16" | 662520085839 |
| 3/8" x 4" (Box of 50) | SLDT-3840 | 1336 | 2108 | 5/16" | 50 | F | 2-1/2" | 3" | 1-1/2" | 7/16" | 7/16" | 6" | Hi-Lo | 9/16" | 9/16" | 662520085860 |
| 3/8" x 5" (Box of 40) | SLDT-3850 | 1336 | 2108 | 5/16" | 40 | H | 3-1/2" | 3" | 1-1/2" | 7/16" | 7/16" | 6" | Hi-Lo | 9/16" | 9/16" | 662520085891 |
| 1/2" x 3" (Box of 25) | SLDT-1230 | 3580 | 2108 | 7/16" | 25 | D | 1" | 5" | 2" | 9/16" | 9/16" | 8" | Hi-Lo | 3/4" | 3/4" | 662520085921 |
| 1/2" x 4" (Box of 25) | SLDT-1240 | 3580 | 2108 | 7/16" | 25 | F | 2" | 5" | 2" | 9/16" | 9/16" | 8" | Hi-Lo | 3/4" | 3/4" | 662520085952 |
| 1/2" x 5" (Box of 25) | SLDT-1250 | 3580 | 2108 | 7/16" | 25 | H | 3" | 5" | 2" | 9/16" | 9/16" | 8" | Hi-Lo | 3/4" | 3/4" | 662520085983 |
* Pull-out and shear values are average ultimate loads in 2000 PSI concrete, offered as a guide only and not guaranteed. A 4:1 safety factor (25% of ultimate) is generally accepted as a safe working load.
Manufacturer Resources
Product Specs
- Product Brand:
- Tapcon
- Product Type:
- Hex Head Concrete Screw
- Department:
- Fasteners
- Product Group:
- Concrete Anchors
- Product Subgroup:
- Concrete Screws
- Product Material:
- 410 Stainless Steel
- Location Rating:
- Moist
Tapcon CSHS38212;T – Frequently Asked Questions
1) What size drill bit do I need for the Tapcon large diameter 3/8 inch and 1/2 inch hex head concrete screws?
Two bit sizes cover the range. The 3/8 inch diameter screws (2-1/2, 3, 4 and 5 inch lengths) drill with a 5/16 inch carbide bit. The 1/2 inch diameter screws (3, 4 and 5 inch) take a 7/16 inch bit. The bit is smaller than the nominal screw diameter because the Hi-Lo thread cuts into the hole wall, so do not upsize the hole or you lose holding power.
2) How deep does a Tapcon large diameter concrete screw have to go into the concrete?
Minimum embedment is 1-1/2 inches for the 3/8 inch screws and 2 inches for the 1/2 inch screws. Add your fixture thickness to that to pick a length: a 3/8 x 2-1/2 inch handles up to 1 inch of fixture, the 3/8 x 3 inch up to 1-1/2 inches, the 3/8 x 4 inch up to 2-1/2 inches, and the 3/8 x 5 inch up to 3-1/2 inches. On the 1/2 inch screws, max fixture thickness is 1 inch at 3 inches long, 2 inches at 4 inches, and 3 inches at 5 inches. Always drill the hole deeper than the embedment so cuttings have somewhere to go.
3) How close to the edge of a concrete slab can I set a 1/2 inch Tapcon screw, and how far apart do they need to be?
Keep 1/2 inch diameter screws at least 5 inches from a free edge and 8 inches apart. The 3/8 inch size allows a 3 inch minimum edge distance and 6 inch minimum spacing. If you are anchoring near a slab edge or a block cell face and cannot hold those numbers, step down to the 3/8 inch screw or move the hole.
4) What hole size do I drill in the fixture itself for a Tapcon large diameter screw?
For the 3/8 inch screws the fixture hole needs to be at least 7/16 inch, whether you spot the hole through the fixture or drill the concrete with the fixture in place. The 1/2 inch screws need a 9/16 inch minimum fixture hole. That clearance lets the screw pass through without the threads biting the steel or wood you are fastening down.
5) Can I use these 410 stainless Tapcon screws outdoors or in a damp environment?
Yes. The 410 stainless steel construction is corrosion resistant and the screw carries a Moist location rating, so exterior anchoring, damp mechanical rooms, parking structures and similar conditions are within scope. 410 is a hardenable martensitic stainless, which is what lets a stainless screw be hard enough to cut its own thread in concrete.
6) Will a Tapcon concrete screw hold in block and brick, or do I need a wedge anchor?
Threads cut directly into pre-drilled holes in concrete, block and brick, so all three substrates are covered. The practical difference from a wedge anchor is removability and reuse of the hole: a screw backs out and can be re-driven, where a wedge anchor is permanent. For cracked-concrete or seismic design where a code-evaluated expansion anchor is specified on the drawings, use the anchor the spec calls out rather than a screw.
7) How many Tapcon large diameter hex head screws come in a box?
Boxes are 50 for the 3/8 x 2-1/2, 3/8 x 3 and 3/8 x 4 inch; 40 for the 3/8 x 5 inch; and 25 for all three 1/2 inch sizes (3, 4 and 5 inch). Each size is sold as a full box, so order by box count for an MRO stock or a bulk job.
8) Which Tapcon part number do I order for a 1/2 inch by 4 inch stainless concrete screw?
That is part SLDT-1240, the 1/2 x 4 inch large diameter 410 stainless hex head screw in a box of 25. The rest of the 1/2 inch family runs SLDT-1230 (3 inch) and SLDT-1250 (5 inch); the 3/8 inch sizes are SLDT-3824, SLDT-3830, SLDT-3840 and SLDT-3850 for the 2-1/2, 3, 4 and 5 inch lengths.
How fast can I get the Tapcon CSHS38212;T delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 Tapcon CSHS38212;T come with a warranty?
Absolutely. The Tapcon CSHS38212;T 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 Tapcon CSHS38212;T?
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