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CONFAST 5/16" Single Expansion Anchor
The CONFAST 5/16" Single Expansion Anchor is a durable concrete anchor engineered for dependable mechanical fastening into solid concrete substrates. Sold by the box, with box quantity varying by size, this anchor is well suited for contractors, builders, and installers who need consistent, jobsite-ready anchoring performance. Every CONFAST 5/16" Single Expansion Anchor is available direct from the manufacturer for the highest quality at the most competitive price. As a true Concrete Anchor product type, it is built to perform in demanding commercial and industrial installation environments where reliable holding power matters.
Key Features
- Precise 5/16" Sizing: Manufactured to a consistent 5/16" diameter for a reliable, repeatable fit and dependable holding power in concrete substrates.
- Single Expansion Design: A true single expansion anchor mechanism provides dependable mechanical engagement as it is set and torqued into concrete.
- Sold by the Box: Packaged and sold by the box, with box quantity clearly shown for each size, simplifying bulk ordering and jobsite planning.
- Direct-Source Value: Purchased direct from CONFAST for the highest quality and savings compared to multi-handler distribution channels.
- Concrete Anchor Construction: Purpose-built as a dedicated Concrete Anchor product type for dependable performance in solid concrete base material.
- Consistent Manufacturing Quality: Produced to consistent sizing and construction standards to support predictable installation results across every box.
Technical Specifications
- Product Type: Concrete Anchor
- Country of Origin: China
Typical Applications
- Commercial Construction Projects
- Concrete Fastening Applications
- Industrial Facility Installations
- Structural Anchoring for Renovations
- General Contractor and Builder Use
- Multi-Trade Construction Sites
- DIY and Professional Installation Projects
Why CONFAST?
CONFAST concrete anchors are offered direct from the manufacturer, giving contractors and builders access to consistent 5/16" single expansion anchors at competitive pricing. Purchasing direct helps ensure you receive the highest quality product available for your concrete anchoring needs, with box quantities clearly listed for every size to make jobsite planning straightforward and efficient. For demanding concrete fastening applications, the CONFAST Single Expansion Anchor delivers a dependable, purpose-built solution contractors can rely on.
Specifications
- Bolt Length: Fixture Thickness + Embedment Depth
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 25) | 1121 | 7/8" | 25 | 1/2" | 7/16" | 4-3/8" | 2" | 1/2" | 1" | 8-3/4" | 7/8" | 1/2" - 13 | 820274001912 |
| 1/4" (Box of 100) | 131 | 1/2" | 100 | 1/4" | 5/16" | 2-1/2" | 1-3/4" | 1/4" | 9/16" | 5" | 1/2" | 1/4" - 20 | 820274001929 |
| 3/4" (Box of 10) | 1825 | 1-1/4" | 10 | 3/4" | 3/4" | 6-1/4" | 2-3/4" | 3/4" | 1-3/8" | 12-1/2" | 1-1/4" | 3/4" - 10 | 820274001936 |
| 3/8" (Box of 50) | 870 | 5/8" | 50 | 3/8" | 5/16" | 3-1/8" | 1-1/2" | 3/8" | 3/4" | — | 5/8" | 3/8" - 16 | 820274001943 |
| 5/16" (Box of 50) | 622 | 5/8" | 50 | 5/16" | 5/16" | 3-1/8" | 1-1/2" | 5/16" | 3/4" | — | 5/8" | 5/16" - 18 | 820274001950 |
| 5/8" (Box of 25) | 1672 | 1" | 25 | 5/8" | 5/8" | 5" | 2-5/8" | 5/8" | 1-1/8" | 10" | 1" | — | 820274001967 |
Manufacturer Resources
Product Specs
- Product Type:
- Expansion Anchor
- Product Brand:
- CONFAST
- Country of Origin:
- China
- Department:
- Fasteners
- Product Group:
- Concrete Anchors
- Product Subgroup:
- Concrete Anchors
- Product Attribute:
- Female
CONFAST SE14 – Frequently Asked Questions
1) What size drill bit do I need for a CONFAST single expansion anchor?
The bit matches the outside diameter of the anchor body, not the bolt size. For the 1/4 inch anchor drill 1/2 inch; 5/16 inch and 3/8 inch both take a 5/8 inch bit; 1/2 inch takes 7/8 inch; 5/8 inch takes 1 inch; and the 3/4 inch anchor takes a 1-1/4 inch bit. Drill the full hole in solid concrete before setting the anchor.
2) How do I work out what length bolt to buy for a single expansion anchor?
Bolt length equals your fixture thickness plus the embedment depth. Minimum embedment runs 1-3/4 inches for the 1/4 inch anchor, 1-1/2 inches for 5/16 inch and 3/8 inch, 2 inches for 1/2 inch, 2-5/8 inches for 5/8 inch, and 2-3/4 inches for the 3/4 inch. The anchor is a female unit, so the bolt is bought separately in the matching thread: 1/4-20, 5/16-18, 3/8-16, 1/2-13 or 3/4-10.
3) How much weight will a 1/2 inch CONFAST single expansion anchor hold?
Published pull-out for the 1/2 inch is 1121 lbs. Across the range: 131 lbs at 1/4 inch, 622 lbs at 5/16 inch, 870 lbs at 3/8 inch, 1672 lbs at 5/8 inch and 1825 lbs at 3/4 inch. Those are ultimate pull-out figures in concrete, so apply your own safety factor for the design load.
4) How far from a concrete edge and from each other can these anchors be set?
Minimum edge distance is 2-1/2 inches for the 1/4 inch anchor, 3-1/8 inches for 5/16 inch and 3/8 inch, 4-3/8 inches for 1/2 inch, 5 inches for 5/8 inch and 6-1/4 inches for 3/4 inch. Minimum spacing between anchors is 5 inches at 1/4 inch, 8-3/4 inches at 1/2 inch, 10 inches at 5/8 inch and 12-1/2 inches at 3/4 inch. Crowd them tighter than that and the concrete, not the anchor, becomes the weak point.
5) Can I use a single expansion anchor in block or brick instead of solid concrete?
No. The CONFAST single expansion anchor is made for solid concrete base material, where the shield expands against sound, continuous substrate. Hollow block cells and brick joints don't give the single expansion shield anything to grip, and the published pull-out values assume concrete. For hollow masonry use an anchor designed for hollow base material instead.
6) What hole size do I need through the fixture I'm bolting down?
Two sets of numbers, depending on how you drill. If the hole is spotted through the fixture, the fixture hole matches the bolt diameter: 1/4, 5/16, 3/8, 1/2, 5/8 or 3/4 inch. If you are drilling the anchor hole in place through the fixture, the fixture hole has to pass the bit, so it needs 9/16 inch for the 1/4 inch anchor, 3/4 inch for 5/16 and 3/8 inch, 1 inch for 1/2 inch, 1-1/8 inches for 5/8 inch and 1-3/8 inches for 3/4 inch.
7) How many anchors come in a box of CONFAST single expansion anchors?
Box count varies with size: 100 for 1/4 inch, 50 each for 5/16 inch and 3/8 inch, 25 each for 1/2 inch and 5/8 inch, and 10 for 3/4 inch. They are sold by the box, not loose, so plan the count per opening before ordering.
8) Is a single expansion anchor the same as a double expansion anchor?
They are not interchangeable in application. Single expansion anchors, like the CONFAST unit here, expand at one point and are meant for solid concrete. Double expansion anchors expand along more of the body and are the usual choice for softer or less consistent base material such as brick or block. If your substrate is sound poured concrete, the single expansion version is the one to use, and the published pull-out ratings, 131 lbs at 1/4 inch up to 1825 lbs at 3/4 inch, are based on that.
9) Can I remove the bolt later and leave the anchor in the slab?
Yes, that's the advantage of a female anchor. The CONFAST single expansion anchor sets flush in the concrete with an internal thread, so the machine bolt can be backed out and the fixture removed and reinstalled without disturbing the anchor. Internal thread length is 5/16 inch on the 1/4, 5/16 and 3/8 inch anchors, 7/16 inch on the 1/2 inch, 5/8 inch on the 5/8 inch and 3/4 inch on the 3/4 inch anchor, so keep the bolt engagement within that.
10) Which size should I pick for hanging conduit, strut or equipment off a concrete ceiling or wall?
Match the size to the load and the bolt you plan to run. Light electrical work such as single conduit straps or small boxes is usually 1/4 inch (131 lbs pull-out) or 5/16 inch (622 lbs). Strut channel and heavier equipment brackets typically call for 3/8 inch (870 lbs) or 1/2 inch (1121 lbs). For machinery bases and heavy structural attachments step up to 5/8 inch (1672 lbs) or 3/4 inch (1825 lbs). Also check that the slab gives you the minimum embedment, from 1-1/2 inches at 3/8 inch up to 2-3/4 inches at 3/4 inch.
How fast can I get the CONFAST SE14 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 SE14 come with a warranty?
Absolutely. The CONFAST SE14 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 SE14?
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