Simpson THDB25178HF1 Description

The Simpson THDB25178HF1 Heavy-Duty Screw Anchor is designed for concrete and masonry applications, featuring a zinc-plated finish and a patented thread design for efficient load transfer.

Simpson THDB25178HF1 Includes

• (1) Heavy-Duty Screw Anchor for Concrete and Masonry, Zinc Plated, 1/4 in. x 1-7/8 in.

Simpson THDB25178HF1 Features

• Tested in accordance with ACI 355.2, AC193 and AC106
• Qualified for static, wind and seismic loading conditions
• Thread design undercuts to efficiently transfer the load to the base material
• Standard fractional sizes
• Specialized heat-treating process creates tip hardness for better cutting without compromising the ductility
• No special drill bit required designed to install using standard-sized ANSI tolerance drill bits
• Hex-washer head requires no separate washer, unless required by code, and provides a clean installed appearance
• Removable ideal for temporary anchoring (e.g., formwork, bracing) or applications where fixtures may need to be moved
• Use in dry interior environments only

Simpson THDB25178HF1 Applications

• Concrete and masonry anchoring
• Temporary anchoring for formwork and bracing
• Interior dry environments

Simpson THDB25178HF1 Installation Overview

1. Drill a hole in the base material using a carbide drill bit of the same diameter as the anchor.
2. Insert the anchor through the fixture and into the hole.
3. Tighten the anchor into the base material until the hex-washer head contacts the fixture.

Simpson THDB25178HF1 Specifications

NOTE: Ensure the anchor is installed only once to maintain its load capacity