CONFAST 3/8 in x 4-1/4 in Wedge Anchor Zinc Plated - Solid Concrete

In this review of the CONFAST 3/8 in x 4-1/4 in Wedge Anchor Zinc Plated (Box of 50), the bottom line is simple: this is a no-nonsense concrete fastener for installers who need consistent hold in dry concrete environments. The reviewer found the anchors to be well packaged with nuts and washers for fast installation and appreciated the straightforward rule that the hole size equals the anchor size, which simplifies layout and drilling. It is best suited for jobs where zinc plating suffices and the substrate is solid concrete only.

Key Features

• Zinc plated finish: Provides corrosion resistance suitable for dry interior concrete installations, helping extend service life where moisture is not present.
• Packaged with nuts and washers: Comes complete for immediate installation, saving time on procurement and ensuring each anchor has the correct mating hardware.
• Hole size equals anchor size: Simplifies installation by requiring a 3/8 in carbide-tipped bit and reducing layout mistakes on the job.
• Minimum embedment requirement: Requires 1-1/2 in embedment into concrete, giving clear guidance for proper load transfer and consistent holding power.
• Wide range of sizes in the line: While this listing is 3/8 in x 4-1/4 in, the product family offers size options so installers can match anchor length and diameter to different concrete tasks.

Who It's For

The CONFAST wedge anchors are aimed at contractors, tradespeople, and DIYers fastening into solid concrete who need a packaged box of 50 anchors with matching nuts and washers for medium-duty fixtures. The simplicity of the hole-size-equals-anchor-size rule and included hardware speed repetitive installations on construction sites or renovation projects.

These anchors are not intended for use in block, brick, or hollow base materials, and they are designed for dry environments only; anyone needing stainless or marine-grade corrosion resistance or an anchor rated for hollow masonry should look at alternative anchor types matched to those substrates and conditions.

Pros & Cons

Pros

• Good value packaging of 50 with nuts and washers for quick, complete installs.
• Zinc plating reduces rust risk in dry environments and keeps costs lower than stainless alternatives.
• Clear installation requirements (3/8 in hole, 1-1/2 in embedment) make for predictable performance.

Cons

• Zinc plating is only suitable for dry environments and will not perform like stainless in wet or corrosive conditions.
• Some users report inconsistent grip or bending under extreme side loads, so they may not be ideal for every heavy-duty application.

Specifications

Brand	CONFAST
Anchor diameter	3/8 in
Anchor length	4-1/4 in
Thread length	2-3/4 in
Hole/bit diameter	3/8 in carbide-tipped bit (ANSI)
Minimum embedment	1-1/2 in
Finish	Zinc plated

Our Verdict

The CONFAST 3/8 in x 4-1/4 in wedge anchor is a practical, cost-effective choice for fastening into solid concrete when work is performed in dry environments. Packaged nuts and washers and clear drilling specs make installation fast and repeatable, and the anchors represent good value for general concrete fixtures; choose a different grade if you need marine or hollow-masonry performance.

Frequently Asked Questions

Can these anchors be used in brick or block?
No. These CONFAST wedge anchors are designed for solid concrete only and should never be used in block or brick base material.

What drill bit should be used?
Use a 3/8 in carbide-tipped bit that meets ANSI standards in a hammer drill to prepare the hole for this anchor.

Are they suitable for outdoor use?
The zinc plating helps in dry environments but is not intended for prolonged exposure to wet, marine, or highly corrosive conditions; stainless anchors are better for those applications.