CONFAST 3/16 in x 4 in Hex Head Concrete Screw Anchor - Bit Included

In this review the CONFAST 3/16 in x 4 in Hex Head Concrete Screw Anchor is assessed for DIYers and contractors who need dependable masonry fasteners. The single biggest reason to buy is practical: each 100-box includes the proper carbide drill bit, which improves hole precision and holding performance compared with buying screws and bits separately. The reviewer found the screws straightforward to set in concrete, block, and brick when using a hammer drill and the included 5/32 in bit, and the slotted hex washer head made final tightening easy with a 1/4 in nut driver.

Key Features

• Bit included: Each box ships with a 5/32 in carbide bit so users get the correct hole size and reduce time hunting for a compatible bit.
• Slotted hex head: The hex washer head sits on the surface and can be driven with a 1/4 in nut driver for quick, consistent installation.
• Self-tapping design: The screw taps threads directly into masonry so no separate sleeve anchor is required for many installations.
• Diamond point tip: The pointed tip makes initial penetration and driving easier, reducing installation time in block and brick.
• Carbon steel construction: The blue carbon steel body feels solid and suits dry interior or sheltered exterior masonry applications.

Who It's For

The CONFAST concrete screw is aimed at homeowners, handypersons, and contractors who install shelving, conduit straps, ledger boards, or fixtures into concrete, block, or brick and who value the convenience of a matched drill bit in the same box. The included bit and slotted hex head speed up small to medium jobs where using a hammer drill and nut driver is practical.

It is less suitable for permanently exposed outdoor installations without additional corrosion protection or for specialized heavy structural loads where engineered anchors with published load tables are required. If stainless steel or a sleeve anchor is specified by plans, choose a different product.

Pros & Cons

Pros

• Includes the correct 5/32 in carbide bit, improving hole accuracy and reducing extra purchases.
• Slotted hex washer head allows easy driving with a 1/4 in nut driver and gives a clean bearing surface.
• Self-tapping and diamond point tip speed installation into concrete, block, and brick.
• Good value for a 100-piece box for routine masonry fastening tasks.

Cons

• Made from carbon steel and intended for dry environments; may need additional corrosion protection for exposed outdoor use.
• Some users report occasional breakage of screw heads during heavy-duty installs, so care during driving torque is advised.

Specifications

Diameter	3/16 in
Length	4 in
Required drill hole	5/32 in (use carbide bit in hammer drill)
Head style	Hex washer head, slotted
Thread length	1-3/4 in
Material and finish	Carbon steel, blue
Driver	1/4 in nut driver required

Our Verdict

The CONFAST 3/16 in x 4 in concrete screws are a practical, cost-effective choice for standard masonry fastening tasks when installed in dry environments. The included correct-size bit and the slotted hex washer head make typical installations faster and cleaner, offering good value for homeowners and contractors doing interior or sheltered exterior work, provided corrosion exposure and heavy structural requirements are considered.

Frequently Asked Questions

What size hole should I drill?
Drill a 5/32 in hole using the supplied carbide bit in a hammer drill for best results.

Can these be used outdoors?
They are carbon steel and intended for dry environments; for exposed outdoor use, consider additional corrosion protection or a stainless option.

What driver do I need?
Use a 1/4 in nut driver to drive the slotted hex washer head for consistent torque and seating.