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CONFAST 304 Stainless Steel Concrete Wedge Anchor
The CONFAST 304 Stainless Steel Concrete Wedge Anchor is engineered for secure, long-lasting anchoring into concrete substrates. Constructed from 304 stainless steel, this wedge anchor delivers strong resistance to rust and corrosion, making it a dependable choice for both indoor and outdoor concrete anchoring projects. As a true wedge-style concrete anchor, it is designed to expand and grip firmly within a drilled hole in concrete, providing secure mechanical anchoring for fixtures, equipment, and structural connections. Each CONFAST wedge anchor is sold by the box, with the box quantity clearly listed for every available size, so contractors and builders can order exactly what the job requires. Backed by U.S. manufacturing, this stainless steel wedge anchor is built to meet the demands of professional installation work.
Key Features
- Corrosion-Resistant Material: Manufactured from 304 stainless steel, offering significantly greater resistance to rust and corrosion than standard zinc-plated or carbon steel anchors.
- Wedge Anchor Design: Features a mechanical wedge-style expansion design that grips securely inside concrete for dependable holding power.
- Concrete Anchor Application: Classified as a concrete anchor, purpose-built for fastening into solid concrete substrates.
- Sold by the Box: Packaged and sold by the box, with the box quantity noted for each individual anchor size for easy bulk ordering.
- Made in the USA: Country of origin is the United States, reflecting domestic manufacturing standards.
- Stainless Steel Durability: 304 stainless steel construction supports long-term performance in interior and exterior concrete anchoring environments, including areas exposed to moisture.
- Professional-Grade Hardware: Suited for contractors, builders, and DIY users who need dependable concrete fastening hardware for a range of project sizes.
Technical Specifications
- Product Type: Concrete Anchor
- Country of Origin: US
Typical Applications
- Anchoring Structural Steel and Framing to Concrete
- Concrete Foundation and Slab Fastening
- Attaching Equipment, Railings, and Fixtures to Concrete
- Commercial and Industrial Construction Projects
- Outdoor and Corrosion-Prone Anchoring Environments
- Renovation and New Construction Installations
Why CONFAST?
CONFAST manufactures its 304 stainless steel wedge anchors to give contractors and builders a corrosion-resistant, dependable option for concrete anchoring. With U.S. manufacturing and box-quantity packaging listed for every size, CONFAST makes it simple to order the right amount of hardware for any concrete fastening project. Choose CONFAST 304 stainless steel wedge anchors for concrete anchoring hardware built to perform in demanding job-site conditions.
Specifications by Size
| Size | Pull-Out (lbs.) | Shear (lbs.) | Bit Size | Box Qty | Length ID Code | Max. Fixture Thickness | Max. Torque | Min. Edge Distance | Min. Embedment | Min. Fixture Hole Ø (Hole Spotted) | Min. Fixture Hole Ø (In Place) | Min. Spacing | Thread Length | Thread Type | Wrench Size | UPC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4" x 1-3/4" (Box of 100) | 877 | 1082 | 1/4" | 100 | A | 3/8" | 5 - 10 ft./lbs. | 1-1/4" | 1-1/8" | 1/4" | 5/16" | 2-1/2" | 5/8" | 1/4" - 20 | 7/16" | 820274003121 |
| 1/4" x 2-1/4" (Box of 100) | 877 | 1082 | 1/4" | 100 | B | 7/8" | 5 - 10 ft./lbs. | 1-1/4" | 1-1/8" | 1/4" | 5/16" | 2-1/2" | 1-1/8" | 1/4" - 20 | 7/16" | 820274003138 |
| 1/4" x 3-1/4" (Box of 100) | 877 | 1082 | 1/4" | 100 | D | 1-7/8" | 5 - 10 ft./lbs. | 1-1/4" | 1-1/8" | 1/4" | 5/16" | 2-1/2" | 2-1/4" | 1/4" - 20 | 7/16" | 820274003152 |
| 3/8" x 2-1/4" (Box of 50) | 1223 | 3238 | 3/8" | 50 | B | 3/8" | 25 - 30 ft./lbs. | 1-7/8" | 1-1/2" | 3/8" | 1/2" | 3-3/4" | 1" | 3/8" - 16 | 9/16" | 820274003220 |
| 3/8" x 2-3/4" (Box of 50) | 1223 | 3238 | 3/8" | 50 | C | 7/8" | 25 - 30 ft./lbs. | 1-7/8" | 1-1/2" | 3/8" | 1/2" | 3-3/4" | 1-1/4" | 3/8" - 16 | 9/16" | 820274003237 |
| 3/8" x 3" (Box of 50) | 1223 | 3238 | 3/8" | 50 | D | 1-1/8" | 25 - 30 ft./lbs. | 1-7/8" | 1-1/2" | 3/8" | 1/2" | 3-3/4" | 1-1/2" | 3/8" - 16 | 9/16" | 820274003244 |
| 3/8" x 3-3/4" (Box of 50) | 1223 | 3238 | 3/8" | 50 | E | 1-7/8" | 25 - 30 ft./lbs. | 1-7/8" | 1-1/2" | 3/8" | 1/2" | 3-3/4" | 2-1/4" | 3/8" - 16 | 9/16" | 820274003268 |
| 3/8" x 5" (Box of 50) | 1223 | 3238 | 3/8" | 50 | H | 3-1/8" | 25 - 30 ft./lbs. | 1-7/8" | 1-1/2" | 3/8" | 1/2" | 3-3/4" | 3-3/4" | 3/8" - 16 | 9/16" | 820274003275 |
| 1/2" x 2-3/4" (Box of 25) | 2999 | 5564 | 1/2" | 25 | C | 1/8" | 50 - 60 ft./lbs. | 2-1/2" | 2-1/4" | 1/2" | 5/8" | 5" | 1" | 1/2" - 13 | 3/4" | 820274003060 |
| 1/2" x 3-3/4" (Box of 25) | 2999 | 5564 | 1/2" | 25 | D | 1" | 50 - 60 ft./lbs. | 2-1/2" | 2-1/4" | 1/2" | 5/8" | 5" | 2-1/4" | 1/2" - 13 | 3/4" | 820274003077 |
| 1/2" x 4-1/4" (Box of 25) | 2999 | 5564 | 1/2" | 25 | F | 1-1/2" | 50 - 60 ft./lbs. | 2-1/2" | 2-1/4" | 1/2" | 5/8" | 5" | 2-1/2" | 1/2" - 13 | 3/4" | 820274003084 |
| 1/2" x 5-1/2" (Box of 25) | 2999 | 5564 | 1/2" | 25 | I | 2-3/4" | 50 - 60 ft./lbs. | 2-1/2" | 2-1/4" | 1/2" | 5/8" | 5" | 3-3/4" | 1/2" - 13 | 3/4" | 820274003091 |
| 5/8" x 3-1/2" (Box of 25) | 3749 | 6198 | 5/8" | 25 | E | 1/8" | 75 - 90 ft./lbs. | 3-1/8" | 2-3/4" | 5/8" | 7/8" | — | 1-1/2" | — | 15/16" | 820274003312 |
| 5/8" x 4-1/2" (Box of 25) | 3749 | 6198 | 5/8" | 25 | G | 1-1/8" | 75 - 90 ft./lbs. | 3-1/8" | 2-3/4" | 5/8" | 7/8" | — | 2-3/4" | — | 15/16" | 820274003329 |
| 5/8" x 5" (Box of 20) | 3749 | 6198 | 5/8" | 20 | H | 1-5/8" | 75 - 90 ft./lbs. | 3-1/8" | 2-3/4" | 5/8" | 7/8" | — | 2-3/4" | — | 15/16" | 820274003336 |
| 5/8" x 6" (Box of 20) | 3749 | 6198 | 5/8" | 20 | J | 2-5/8" | 75 - 90 ft./lbs. | 3-1/8" | 2-3/4" | 5/8" | 7/8" | — | 3-3/4" | — | 15/16" | 820274003343 |
| 3/4" x 4-1/4" (Box of 20) | 4978 | 9378 | 3/4" | 20 | F | 1/4" | 150 - 175 ft./lbs. | 3-3/4" | 3-1/4" | 3/4" | 1" | 7-1/2" | 1-3/4" | 3/4" - 10 | 1-1/8" | 820274003169 |
| 3/4" x 4-3/4" (Box of 20) | 4978 | 9378 | 3/4" | 20 | G | 3/4" | 150 - 175 ft./lbs. | 3-3/4" | 3-1/4" | 3/4" | 1" | 7-1/2" | 2-1/4" | 3/4" - 10 | 1-1/8" | 820274003176 |
| 3/4" x 5-1/2" (Box of 20) | 4978 | 9378 | 3/4" | 20 | I | 1-1/2" | 150 - 175 ft./lbs. | 3-3/4" | 3-1/4" | 3/4" | 1" | 7-1/2" | 3" | 3/4" - 10 | 1-1/8" | 820274003183 |
| 3/4" x 6-1/4" (Box of 20) | 4978 | 9378 | 3/4" | 20 | J | 2-1/4" | 150 - 175 ft./lbs. | 3-3/4" | 3-1/4" | 3/4" | 1" | 7-1/2" | 3-3/4" | 3/4" - 10 | 1-1/8" | 820274003190 |
| 1/2" x 7" (Box of 25) | 2999 | 5564 | 1/2" | 25 | L | — | 50 - 60 ft./lbs. | 2-1/2" | 2-1/4" | 1/2" | 5/8" | 5" | 4" | 1/2" - 13 | 3/4" | 820274003107 |
| 5/8" x 7" (Box of 20) | 3749 | 6198 | 5/8" | 20 | L | 3-5/8" | 75 - 90 ft./lbs. | 3-1/8" | 2-3/4" | 5/8" | 7/8" | — | 4" | — | 15/16" | 820274003350 |
| 5/8" x 8-1/2" (Box of 20) | 3749 | 6198 | 5/8" | 20 | O | 5-1/8" | 75 - 90 ft./lbs. | 3-1/8" | 2-3/4" | 5/8" | 7/8" | — | 4" | — | 15/16" | 820274003367 |
| 3/4" x 7" (Box of 10) | 4978 | 9378 | 3/4" | 10 | L | 3" | 150 - 175 ft./lbs. | 3-3/4" | 3-1/4" | 3/4" | 1" | 7-1/2" | 4" | 3/4" - 10 | 1-1/8" | 820274003206 |
| 3/4" x 8-1/2" (Box of 10) | 4978 | 9378 | 3/4" | 10 | O | 4-1/2" | 150 - 175 ft./lbs. | 3-3/4" | 3-1/4" | 3/4" | 1" | 7-1/2" | 4" | 3/4" - 10 | 1-1/8" | 820274003213 |
| 3/4" x 10" (Box of 10) | 4978 | 9378 | 3/4" | 10 | R | 6" | 150 - 175 ft./lbs. | 3-3/4" | 3-1/4" | 3/4" | 1" | 7-1/2" | 4" | 3/4" - 10 | 1-1/8" | 820274003558 |
| 1" x 6" (Box of 5) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1" x 9" (Box of 5) | 7329 | 17712 | 1" | 5 | P | 3-1/2" | 250 - 300 ft./lbs. | 5" | 4-1/2" | 1" | 1-1/4" | 10" | 4" | 1" - 8 | 1-1/2" | 820274003541 |
| 1" x 12" (Box of 5) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Manufacturer Resources
Product Specs
- Product Brand:
- CONFAST
- Product Type:
- Concrete Anchor
- Country of Origin:
- US
- Department:
- Fasteners
- Product Group:
- Concrete Anchors
- Product Subgroup:
- Concrete Anchors
- Product Material:
- 304 Stainless Steel
- Location Rating:
- Wet
- Base Material:
- Concrete only
- Product Attribute:
- Male (threaded stud)
CONFAST WAS38214A – Frequently Asked Questions
1) Can CONFAST 304 stainless wedge anchors be used in block, brick, or mortar?
No. The CONFAST 304 stainless wedge anchor is rated for concrete only. In hollow block, brick, or mortar joints the wedge clip has nothing solid to expand against, so you need a different anchor type for those base materials. Use it in poured concrete slabs, walls, and foundations.
2) What size hole do I drill for a CONFAST stainless wedge anchor?
Drill with a carbide bit the same nominal size as the anchor: 1/4 inch bit for 1/4 inch anchors, 3/8 for 3/8, 1/2 for 1/2, 5/8 for 5/8, 3/4 for 3/4, and 1 inch for the 1 inch anchors. That one-to-one bit sizing is what lets the anchor be driven through the fixture into a spotted hole.
3) How deep do these wedge anchors have to go into the concrete?
Minimum embedment runs 1-1/8 inches for the 1/4 inch size, 1-1/2 inches for 3/8 inch, 2-1/4 inches for 1/2 inch, 2-3/4 inches for 5/8 inch, 3-1/4 inches for 3/4 inch, and 4-1/2 inches for the 1 inch anchor. Your slab has to be thick enough to take that embedment plus room for dust at the bottom of the hole, so on a thin slab step down a diameter rather than shorten the embedment.
4) How do I pick the right anchor length for the thickness of what I'm bolting down?
Work from the maximum fixture thickness in the size table, not from the overall length. A 1/2 inch x 2-3/4 inch anchor only clamps 1/8 inch of material, while the 1/2 inch x 4-1/4 inch handles 1-1/2 inches and the 1/2 inch x 5-1/2 inch handles 2-3/4 inches. Same pattern in 3/8 inch: 2-1/4 inch length takes 3/8 inch of fixture, the 5 inch length takes 3-1/8 inches. Add your base plate or rail thickness to the required embedment and choose the length that covers both.
5) How close to a slab edge can I set a stainless wedge anchor, and how far apart do they need to be?
Minimum edge distance is 1-1/4 inches for 1/4 inch anchors, 1-7/8 inches for 3/8 inch, 2-1/2 inches for 1/2 inch, 3-1/8 inches for 5/8 inch, 3-3/4 inches for 3/4 inch, and 5 inches for 1 inch. Minimum anchor-to-anchor spacing is 2-1/2 inches at 1/4 inch, 3-3/4 inches at 3/8 inch, 5 inches at 1/2 inch, 7-1/2 inches at 3/4 inch, and 10 inches at 1 inch. Crowd either one and the concrete spalls instead of holding.
6) What torque should I tighten these wedge anchors to?
Installation torque by diameter: 5 to 10 ft-lbs for 1/4 inch, 25 to 30 ft-lbs for 3/8 inch, 50 to 60 ft-lbs for 1/2 inch, 75 to 90 ft-lbs for 5/8 inch, 150 to 175 ft-lbs for 3/4 inch, and 250 to 300 ft-lbs for 1 inch. Use a torque wrench, not an impact gun; over-torquing a stainless stud can gall the threads or strip the cone out of the hole.
7) How big does the hole in my base plate need to be for a wedge anchor?
Two numbers to check. If you drill the concrete through the fixture (hole spotted), the fixture hole can match the anchor diameter: 1/4, 3/8, 1/2, 5/8, 3/4 or 1 inch. If the anchor is set first and the fixture drops over it (in place), size the fixture hole larger: 5/16 inch for 1/4 inch anchors, 1/2 inch for 3/8, 5/8 inch for 1/2, 7/8 inch for 5/8, 1 inch for 3/4, and 1-1/4 inch for 1 inch, so the expansion clip clears.
8) Are these wedge anchors OK outdoors or in wet locations?
Yes. The 304 stainless construction and Wet location rating make these suitable for exterior slabs, wash-down areas, and damp interiors where a zinc-plated carbon steel anchor would rust and bleed onto the concrete. For an interior dry mechanical room a plated wedge anchor does the same mechanical job, so the stainless is what you buy when moisture, not load, is the issue.
9) What wrench or socket size fits the nut on these anchors?
Across-flats wrench size is 7/16 inch on 1/4 inch anchors, 9/16 inch on 3/8 inch, 3/4 inch on 1/2 inch, 15/16 inch on 5/8 inch, 1-1/8 inch on 3/4 inch, and 1-1/2 inch on the 1 inch anchor. Worth checking before you load the truck, since the larger sizes need a deep socket and a long bar to reach their torque range.
10) What kind of load will a 1/2 inch stainless wedge anchor hold?
Published ultimate values for the 1/2 inch size are 2,999 lbs pull-out and 5,564 lbs shear. For comparison, 1/4 inch is 877 pull-out and 1,082 shear, 3/8 inch is 1,223 and 3,238, 5/8 inch is 3,749 and 6,198, 3/4 inch is 4,978 and 9,378, and 1 inch reaches 7,329 pull-out with 17,712 shear. These are ultimate test figures, so apply your own engineer's safety factor before you size a structural connection.
11) What thread does the stud take, so I can order matching nuts and washers?
The stud is a male threaded stud in standard UNC: 1/4-20, 3/8-16, 1/2-13, 3/4-10, and 1-8. Thread length varies with the anchor length, for example 5/8 inch on the 1/4 x 1-3/4 up to 4 inches on the 1/2 x 7. A nut and washer come as part of the assembly; any additional hardware you stack on it needs to be the matching UNC size in stainless to avoid mixing metals.
12) How many anchors come in a box, and do the counts change by size?
Yes, box count drops as the anchor gets bigger. 1/4 inch sizes come 100 per box, 3/8 inch come 50, 1/2 inch and the shorter 5/8 inch come 25, longer 5/8 inch and the shorter 3/4 inch come 20, longer 3/4 inch come 10, and the 1 inch anchors come 5 per box. Box quantity is called out in each size option, so a multi-size job needs the counts checked line by line.
13) Can a wedge anchor be removed or reused if I have to move a base plate?
No, treat it as permanent. A wedge anchor works by pulling a cone into an expansion clip inside the drilled hole, so once it is set it cannot be backed out intact or re-seated in the same hole. If a fixture may need relocating, plan on cutting the stud flush and drilling a new hole at the minimum spacing for that diameter (for instance 5 inches apart on 1/2 inch anchors).
14) Are these anchors made in the USA for a Buy American spec job?
Country of origin on the CONFAST 304 stainless wedge anchors is the United States, which is what a government or institutional buyer needs on the submittal for domestic material requirements.
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Does the CONFAST WAS38214A come with a warranty?
Absolutely. The CONFAST WAS38214A is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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