CONFAST 5/8 in x 3-1/2 in Wedge Anchor Zinc Plated - Concrete

In this review the CONFAST 5/8 in x 3-1/2 in Wedge Anchor Zinc Plated (Box of 25) is examined for contractors, shop owners and DIYers who need durable anchors for concrete mounting. The bottom line: it is a straightforward, no-nonsense concrete anchor kit that delivers strong holding power and arrives complete with nuts and washers for immediate installation. The zinc plating helps resist corrosion in dry environments, and the anchors are sized so the hole diameter matches the anchor diameter for simple drilling and consistent results.

Key Features

• Zinc plated finish: Provides basic corrosion resistance suitable for dry indoor concrete installations, extending service life compared with bare steel.
• Packaged complete: Each box includes nuts and washers so crews can install anchors immediately without searching for hardware, saving time on the job.
• Hole size equals anchor size: Simplifies layout and drilling because a 5/8 in bit produces the correct hole diameter for reliable seating.
• Designed for concrete only: The wedge design and carbon steel construction deliver dependable expansion in solid concrete for structural or equipment anchoring.
• Thread length and embedment: With 1-3/4 in of threads and a 2-3/4 in minimum embedment, the anchors offer sufficient engagement for many medium-duty to heavy-duty attachments.

Who It's For

This product suits mechanics, fabricators and contractors who fasten machinery, racks, lifts or structural items to poured concrete and who need a ready-to-use box of anchors with hardware. Shops mounting 2-post or 4-post lifts, small fabrication shops, and maintenance crews will appreciate the included nuts and washers and the anchors' simplicity.

It is not intended for brick, block or hollow masonry; installers working with those substrates should choose anchors rated for hollow/aggregate bases. Also, if installations will be continuously exposed to moisture or outdoor weather, a stainless steel anchor would be a better long-term choice than zinc plated carbon steel.

Pros & Cons

Pros

• Complete kit with nuts and washers for fast, single-trip installation.
• Simple sizing rule where the hole diameter equals the anchor diameter reduces layout errors.
• Customers report strong holding power in concrete and good value for money.
• Zinc plating offers corrosion resistance suitable for dry indoor use.

Cons

• Zinc plating is not ideal for wet or outdoor environments compared with stainless steel.
• A few users reported occasional wedges that did not grip perfectly, indicating careful installation is important.

Specifications

Brand	CONFAST
Anchor diameter	5/8 in
Anchor length	3-1/2 in
Thread length	1-3/4 in
Minimum embedment	2-3/4 in
Hole diameter / bit	5/8 in carbide tipped bit
Finish / material	Zinc plated carbon steel

Our Verdict

The CONFAST 5/8 in x 3-1/2 in Wedge Anchor is a practical, cost-effective choice for anyone anchoring equipment or structures into solid concrete indoors. It ships with the required nuts and washers and uses a simple hole-sizing rule that reduces installation errors, making it good value for contractors and shops that need reliable medium- to heavy-duty concrete anchors in dry environments.

Frequently Asked Questions

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

What drill bit should be used?
Use a 5/8 in carbide tipped bit that meets ANSI standards in a hammer drill to produce the correct hole diameter.

Are they suitable for outdoor use?
The zinc plating is intended for dry environments; for prolonged outdoor or wet exposure, stainless anchors are recommended.