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CONFAST DIS 304 Stainless Steel Drop-In Anchor for Concrete Applications
The CONFAST DIS 304 Stainless Steel Drop-In Anchor is a concrete anchoring solution constructed entirely from 304 stainless steel for dependable holding power in commercial and industrial installations. Available in multiple sizes, including the popular 1/2" option, each anchor is sold by the box, with box quantity clearly indicated for the specific size ordered. As a drop-in style anchor, it is designed to be set flush into a pre-drilled concrete hole, providing a secure, internally threaded anchor point once expanded. Every CONFAST drop-in anchor is kept in stock for fast, reliable delivery to job sites, warehouses, and distribution centers.
Key Features
- Multiple Size Options: Available in a range of sizes, including 1/2", with box quantity specified for each individual size to support accurate ordering.
- 304 Stainless Steel Construction: Built entirely from 304 stainless steel for durable, long-lasting performance in demanding installation environments.
- Sold By The Box: Packaged and sold by the box, with the exact box quantity shown for each individual size rather than sold individually.
- Concrete Anchoring Application: Engineered as a drop-in style concrete anchor for secure, internally threaded fastening into concrete substrates.
- In-Stock Availability: Maintained in stock for fast turnaround and reliable availability whenever an order is placed.
- Commercial-Grade Material: Stainless steel construction supports use in environments and applications where standard carbon steel anchors may be insufficient.
- Consistent Sizing Reference: Box-level quantity labeling makes it easy for contractors to plan material takeoffs for larger concrete anchoring projects.
Technical Specifications
- Product Type: Concrete Anchor
- Country of Origin: China
Typical Applications
- Commercial Construction Projects
- Industrial Facility Installations
- Concrete Foundation and Structural Work
- Warehouse and Distribution Center Fit-Outs
- Municipal and Government Infrastructure Projects
- Retail and Commercial Buildout Applications
- Multi-Family and Residential Construction
Why CONFAST DIS?
CONFAST 304 stainless steel drop-in anchors are manufactured for consistent, dependable performance in concrete anchoring applications where material quality and accurate box-level packaging matter. With multiple sizes sold by the box and maintained in stock, CONFAST makes it easy for contractors, distributors, and facility teams to get the right anchor quickly, order the correct quantity, and keep projects moving without delay.
Specifications
- Bolt Length: Fixture Thickness + Embedment Depth
- Thread Length: 5/8"
Specifications by Size
| Size | Pull-Out (lbs.) | Bit Size | Box Qty | Inside Anchor Ø-Bolt Ø | Internal Thread Length | Min. Edge Distance | Min. Embedment | Min. Fixture Hole Ø (Hole Spotted) | Min. Fixture Hole Ø (In Place) | Min. Spacing | Outside Anchor Ø | Thread Type | UPC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" (Box of 50) | 2328 | 5/8" | 50 | 1/2" | 13/16" | 3-1/8" | 2" | 1/2" | — | — | 5/8" | 1/2" - 13 | 820274000441 |
| 1/4" (Box of 100) | 704 | 3/8" | 100 | 1/4" | 7/16" | 1-7/8" | 1" | 1/4" | 7/16" | 3-3/4" | 3/8" | 1/4" - 20 | 820274000458 |
| 3/4" (Box of 25) | 5008 | 1" | 25 | 3/4" | 1-3/8" | 5" | 3-3/16" | 3/4" | 1-1/8" | 10" | 1" | 3/4" - 10 | 820274000519 |
| 3/8" (Box of 50) | 1170 | 1/2" | 50 | 3/8" | 5/8" | 2-1/2" | 1-9/16" | 3/8" | 9/16" | 5" | 1/2" | 3/8" - 16 | 820274000526 |
| 5/8" (Box of 25) | 2492 | 7/8" | 25 | 5/8" | 1-3/16" | 4-3/8" | 2-1/2" | 5/8" | 1" | 8-3/4" | 7/8" | — | 820274000533 |
Manufacturer Resources
Product Specs
- Product Type:
- Drop-In Anchor
- Product Brand:
- CONFAST
- Product Material:
- 304 Stainless Steel
- Country of Origin:
- China
- Department:
- Fasteners
- Product Group:
- Concrete Anchors
- Product Subgroup:
- Concrete Anchors
- Location Rating:
- Wet
- Base Material:
- Concrete only
- Product Attribute:
- Female
CONFAST DIS38 – Frequently Asked Questions
1) What drill bit size do I need for CONFAST 304 stainless drop-in anchors?
The bit matches the anchor's outside diameter, not the bolt size. Use a 3/8 inch bit for the 1/4 inch anchor, 1/2 inch for the 3/8, 5/8 inch for the 1/2, 7/8 inch for the 5/8, and a 1 inch bit for the 3/4 inch anchor. That trips up crews used to wedge anchors, where the bit equals the bolt size.
2) How deep does the hole have to be for a drop-in anchor in a concrete slab?
Minimum embedment runs 1 inch for the 1/4 inch anchor, 1-9/16 inches for the 3/8, 2 inches for the 1/2, 2-1/2 inches for the 5/8, and 3-3/16 inches for the 3/4 inch. Drill deeper than the anchor length so drilling dust does not keep the anchor from seating flush, since a drop-in has to sit flush with the concrete surface to be set properly.
3) What bolt length should I order to go with these anchors?
Bolt length is fixture thickness plus embedment depth. The internal thread only goes so far in, so a longer bolt gains you nothing: thread length is 5/8 inch, with internal thread lengths of 7/16 inch on the 1/4, 5/8 inch on the 3/8, 13/16 inch on the 1/2, 1-3/16 inches on the 5/8 and 1-3/8 inches on the 3/4 inch anchor. Threads are standard UNC: 1/4-20, 3/8-16, 1/2-13 and 3/4-10.
4) Can I use these drop-in anchors in block or brick?
No. These are rated for concrete only. Hollow block, brick and mortar joints need a different anchor type, because a drop-in relies on solid concrete around the expanding sleeve to develop any holding value.
5) How far from a slab edge and from each other can these anchors be placed?
Minimum edge distance is 1-7/8 inches for the 1/4 inch anchor, 2-1/2 inches for the 3/8, 3-1/8 inches for the 1/2, 4-3/8 inches for the 5/8 and 5 inches for the 3/4. Minimum spacing between anchors is 3-3/4 inches on the 1/4, 5 inches on the 3/8, 8-3/4 inches on the 5/8 and 10 inches on the 3/4 inch. Crowd them tighter and you risk spalling the concrete during expansion.
6) Will stainless drop-in anchors hold up outdoors or in a wet area?
They're built entirely from 304 stainless steel and carry a wet location rating, so exterior slabs, wash-down areas, mechanical rooms and pool decks are in scope. That's the reason to pay for stainless over a zinc-plated carbon steel drop-in, which corrodes in the same conditions.
7) What pull-out values do these CONFAST drop-in anchors have?
Published pull-out is 704 lbs for 1/4 inch, 1,170 lbs for 3/8 inch, 2,328 lbs for 1/2 inch, 2,492 lbs for 5/8 inch and 5,008 lbs for 3/4 inch. Those are ultimate pull-out figures, not working loads, so apply the safety factor your engineer or spec calls for before sizing to a fixture load.
8) Should I use a drop-in anchor or a wedge anchor for hanging pipe and strut off a concrete deck?
A drop-in is the one to use when you want a flush, internally threaded (female) anchor point you can bolt into and unbolt later, which is why overhead trapeze, strut and hanger rod work uses them. A wedge anchor leaves a stud sticking out of the concrete permanently and can't be removed cleanly. Set the drop-in flush, then thread in rod or a bolt of the right length.
9) What size hole does my fixture need for these anchors?
If the hole in the fixture is spotted through after the anchor is set, the fixture hole matches the bolt diameter: 1/4, 3/8, 1/2, 5/8 or 3/4 inch. Installing through a fixture already in place needs a larger hole to clear the anchor body: 7/16 inch for the 1/4 inch anchor, 9/16 inch for the 3/8, 1 inch for the 5/8 and 1-1/8 inches for the 3/4 inch.
10) Are CONFAST drop-in anchors sold individually or by the box?
By the box only, and the count changes with size: 100 per box on 1/4 inch, 50 per box on 3/8 and 1/2 inch, 25 per box on 5/8 and 3/4 inch. Worth knowing for takeoffs, since ordering five boxes of 3/4 inch gets you 125 anchors, not 250.
How fast can I get the CONFAST DIS38 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 CONFAST DIS38 come with a warranty?
Absolutely. The CONFAST DIS38 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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