Hillman Fasteners 375309 Concrete Screw 1/4x2-1/4 100PK

Product Description

The HILLMAN FASTENERS 375309 is a Phillips flat head tapper concrete screw designed for anchoring into concrete, masonry, and similar hard substrates. Sized at 1/4 inch diameter by 2-1/4 inches in length, this screw features a Blue Perma-Seal coating that resists corrosion in demanding installation environments. Each screw is engineered for a 1-1/2 inch embedment depth, delivering an ultimate tension load of 1,850 lb in 4,000 psi concrete and an ultimate shear load of 2,270 lb in 4,000 psi concrete. A Phillips drive bit is included with the pack. Licensed contractors, electricians, plumbers, and general trade professionals use this fastener for securing fixtures, brackets, and equipment to concrete surfaces.

This 100-piece pack suits residential and light commercial installations where repeated anchoring into concrete or block is required. Common applications include mounting electrical panels, conduit supports, plumbing hangers, mechanical equipment bases, and structural brackets directly to poured concrete or CMU walls. The included drill bit streamlines the installation process by keeping the necessary tooling with the fasteners. The flat head profile sits flush with the substrate surface, making it appropriate for applications where a low-profile finish is needed.

Key Features

• 1/4 inch diameter by 2-1/4 inch length tapper concrete screw
• Blue Perma-Seal coating for corrosion resistance
• 1-1/2 inch embedment depth
• Ultimate tension: 1,850 lb in 4,000 psi concrete
• Ultimate shear: 2,270 lb in 4,000 psi concrete
• Phillips flat head drive for flush-mount installation
• 100-piece pack includes installation bit

Compatibility

Designed as an OEM-style masonry anchor screw suitable for use in poured concrete, concrete block, and similar masonry substrates where a 1/4 inch tapper-style fastener is specified.

Installation Notes

Installation is typically performed by licensed contractors, electricians, or plumbers securing trade equipment and fixtures to concrete substrates. A hammer drill and appropriately sized carbide-tipped masonry bit are required to pre-drill the pilot hole before driving the screw. Always verify hole depth matches the required embedment before installation, and follow applicable local building codes and manufacturer load table guidance when calculating anchor spacing and load capacity. Do not install into cracked, spalled, or deteriorated concrete.