CONFAST 5/16 in x 2-3/4 in Stainless Steel Wedge Anchor - Corrosion

In this review the CONFAST 5/16 in x 2-3/4 in Stainless Steel Wedge Anchor is recommended for anyone who needs a reliable fastener for concrete in wet or submerged settings. The single biggest reason to buy is the 304 stainless construction, which means the anchors resist rust and hold up where carbon steel would fail. The review looks at real-world installation details, fit for common jobs like mounting HVAC equipment and securing posts to concrete decks, and why the included nuts and washers speed up a complete installation.

Key Features

• 304 Stainless Steel: Provides corrosion resistance so the anchor can be used in wet or submerged environments without rusting.
• Hole Size Matches Anchor: Uses a 5/16 in hole for straightforward drilling and simple installation with standard bits.
• Packaged Complete: Each anchor comes with nuts and washers so installation is fast and does not require separate hardware purchases.
• Thread Length: 1-1/2 in of thread allows for secure fastening and adjustment when mounting equipment or fixtures.
• Concrete Use Only: Designed specifically for concrete bases, giving predictable holding strength when installed to the specified embedment depth.

Who It's For

These wedge anchors are aimed at contractors, installers, and homeowners who need durable anchors for outdoor concrete work, such as mounting mini split units, securing pergolas or gazebo posts, and anchoring equipment on concrete decks. The stainless construction is especially valuable where exposure to moisture, salt air, or occasional submersion is expected.

They are not meant for use in block or brick base material, so anyone working with hollow masonry should look for anchors specifically rated for block or brick. Also, projects that require different diameters or longer embedment should select the appropriate anchor length or style.

Pros & Cons

Pros

• High corrosion resistance from 304 stainless steel increases longevity in wet environments.
• Includes nuts and washers for a complete installation and quicker job completion.
• Easy installation using a 5/16 in carbide tipped bit in a hammer drill makes fitting straightforward.

Cons

• Designed for concrete only, so it is not suitable for block or brick applications.
• Length and diameter are fixed, so different jobs may require ordering other sizes.

Specifications

Anchor Diameter	5/16 in
Anchor Length	2-3/4 in
Thread Length	1-1/2 in
Minimum Embedment	1-1/8 in
Hole Diameter / Bit	5/16 in carbide tipped bit
Material	304 Stainless Steel
Pack Quantity	100 per box (includes nuts and washers)

Our Verdict

The CONFAST 5/16 in x 2-3/4 in Stainless Steel Wedge Anchor is a solid choice for professionals and DIYers who need dependable anchors for concrete in wet conditions; the stainless construction and included hardware deliver reliable corrosion resistance and turnkey installation, making it good value for typical exterior and equipment-mounting projects.

Frequently Asked Questions

Can these anchors be used in wet or submerged conditions?
Yes. They are made from 304 stainless steel and are designed for wet environments and resist rusting.

What size drill bit is required?
The anchor requires a 5/16 in hole drilled with a carbide tipped bit used in a hammer drill.

Can I use these in block or brick?
No. These wedge anchors are designed for concrete only and should not be used in block or brick base materials.