CONFAST 5/16ft x 3-1/2ft Wedge Anchor Zinc Plated - Concrete Fastening

In this review the CONFAST 5/16' x 3-1/2' Wedge Anchor Zinc Plated (Box of 100) is assessed for contractors, DIYers, and maintenance crews who need reliable concrete anchors in dry environments. The bottom line: this pack is best for projects that require consistent, conventional wedge anchors with supplied nuts and washers, because the anchors are zinc plated for corrosion resistance in dry conditions and are sized so the hole diameter matches the anchor for straightforward installation.

Key Features

• Zinc plated finish: Helps prevent rust in dry environments so installed anchors maintain appearance and function where moisture is minimal.
• Complete package: Packaged with nuts and washers to make installation fast and ensure a complete fastening solution out of the box.
• Hole size equals anchor size: A 5/16' hole requirement simplifies preparation and reduces sizing mistakes during installation.
• Wide range of sizes: Availability of common sizes like 5/16' x 3-1/2' increases the chance of matching the fastener to the job for optimal performance.
• Designed for concrete: Manufactured from carbon steel and intended specifically for concrete use, so users get an anchor matched to the substrate.

Who It's For

This product suits general contractors, framers, and experienced DIYers who install fixtures into solid concrete and want a bulk box to save time and money. The included nuts and washers are helpful for crews that need to finish multiple anchor points quickly without sourcing additional hardware.

It is not intended for use in block or brick base material, and anyone working in damp or corrosive environments should choose a stainless or specially coated anchor instead. Those who need specialized hold in hollow or fissured masonry should look for anchors rated specifically for those substrates.

Pros & Cons

Pros

• Good value for a box of 100 when compared to higher-priced alternatives, making it cost effective for large jobs.
• Easy to install because the anchor diameter and recommended drill bit match, reducing chance of misdrilled holes.
• Customers report strong hold in solid concrete and describe the anchors as quality carbon steel pieces with reliable threads.

Cons

• Performance is mixed on anchor hold for some users, so results may vary with installation technique and concrete condition.
• Zinc plating is intended for dry environments only and will not offer long-term corrosion protection in wet or coastal locations.

Specifications

Brand	CONFAST
Material	Carbon Steel, Zinc Plated
Diameter	5/16'
Length	3-1/2'
Thread length	2-1/4'
Required hole diameter	5/16'
Minimum embedment	1-1/8'

Our Verdict

The CONFAST 5/16' x 3-1/2' wedge anchors are a practical, value-oriented choice for fastening into solid concrete when work is in dry environments. With nuts and washers included and straightforward sizing, they save time on common installs; buyers seeking enhanced corrosion resistance or guaranteed grip in marginal concrete conditions should consider alternatives, but for standard concrete applications these anchors provide good utility and economy.

Frequently Asked Questions

Can these anchors be used in brick or block?
No. They are designed for use in concrete only and should never be used in block or brick base material.

What drill bit should be used?
Use a 5/16' carbide tipped bit that meets ANSI standards and a hammer drill to achieve the required hole diameter in concrete.

Are these anchors suitable for outdoor coastal use?
No. The zinc plating is meant for dry environments; for outdoor or coastal use choose stainless or specialized corrosion-resistant anchors.