Hillman Fasteners 375311 Concrete Screw 1/4x3-1/4 in 100PK

Product Description

The HILLMAN FASTENERS 375311 is a Phillips flat head tapper concrete screw designed for direct fastening into concrete, block, and masonry without requiring an anchor. Each screw measures 1/4 inch in diameter by 3-1/4 inches in length and features a Blue Perma-Seal corrosion-resistant coating. The flat head profile sits flush with the surface after installation. With a minimum embedment of 1-3/4 inches into 4,000 psi concrete, this fastener delivers an ultimate tension load of 2,330 lb and an ultimate shear load of 2,390 lb. The package includes 100 screws and comes with a drill bit. Installed by licensed contractors, general tradespeople, and experienced DIYers working with concrete substrates.

This screw is suited for attaching wood, metal, and other materials to concrete, block, or brick in both residential and light commercial applications. Typical uses include securing electrical conduit straps, furring strips, sill plates, and mechanical equipment bases to concrete floors, walls, and foundations. The flush flat head is well-suited for applications where a low-profile finish is required. The included Phillips bit allows for immediate use with a standard drill or impact driver.

Key Features

• 1/4 inch diameter by 3-1/4 inch length for medium-duty concrete fastening
• Blue Perma-Seal coating provides corrosion resistance in exposed or damp environments
• 1-3/4 inch minimum embedment depth into 4,000 psi concrete
• Ultimate tension capacity: 2,330 lb in 4,000 psi concrete
• Ultimate shear capacity: 2,390 lb in 4,000 psi concrete
• Phillips flat head profile installs flush with the work surface
• 100-pack quantity includes a matching drill bit

Compatibility

Designed for use in concrete, block, and masonry substrates as a direct-embed tapper screw requiring no plastic anchor or insert.

Installation Notes

Installation requires pre-drilling a pilot hole in the concrete using the supplied or appropriate carbide-tipped masonry bit sized to the screw diameter. Confirm minimum embedment depth of 1-3/4 inches is achieved for rated load performance. Follow applicable building codes and fastener manufacturer load tables when using in structural or code-inspected applications. Wear appropriate eye protection when drilling into concrete or masonry.