Hillman Fasteners 375304 Concrete Screw 3/16x3-1/4 in 100 Pack

Product Description

The HILLMAN FASTENERS 375304 is a Phillips flat head tapper concrete screw designed for anchoring into concrete, masonry, and similar hard substrates. Each screw measures 3/16 inches in diameter by 3-1/4 inches in length and features a Blue Perma-Seal coating for corrosion resistance. With a 1-3/4 inch embedment depth, this fastener delivers an ultimate tension load of 1,520 pounds in 4,000 psi concrete and an ultimate shear load of 1,340 pounds in the same substrate. The flat head profile sits flush with the surface after installation. This 100-pack includes a compatible bit for direct use. It is suited for general construction, concrete forming, and structural attachment tasks performed by contractors, electricians, and plumbers.

This concrete screw is used in residential and commercial applications where a reliable, code-compliant anchor into concrete or masonry is required. Typical scenarios include securing electrical conduit straps, plumbing brackets, HVAC equipment bases, framing ledgers, and fixture mounts to concrete walls or floors. The included Phillips bit allows for immediate use without a separate tool purchase. The 100-pack quantity is appropriate for production work or jobsite stocking.

Key Features

• 3/16 inch diameter by 3-1/4 inch length for standard concrete anchoring depth
• Blue Perma-Seal coating provides corrosion resistance in exposed or damp environments
• 1-3/4 inch embedment depth for consistent, repeatable holding strength
• Ultimate tension load of 1,520 pounds in 4,000 psi concrete
• Ultimate shear load of 1,340 pounds in 4,000 psi concrete
• Phillips flat head profile sits flush after installation
• 100-pack includes a compatible Phillips bit

Compatibility

Designed as a direct-install tapper screw for use in concrete, block, and masonry substrates where a pre-drilled pilot hole is required prior to installation.

Installation Notes

Installation is performed by contractors, electricians, plumbers, and HVAC technicians working with concrete or masonry surfaces. A hammer drill and the correct carbide-tipped bit sized for 3/16 inch concrete screws are required to drill the pilot hole before driving the fastener. Follow applicable building codes, including IBC and local amendments, for minimum embedment and edge-distance requirements. Do not overtorque the screw, as stripping the concrete anchor hole will reduce holding strength.