M20 DTI Washer – Direct Tension Indicator Washer for Structural Bolting | High Strength Bolt Tension Washer

The M20 DTI Washer (Direct Tension Indicator Washer) is a specialized washer used to ensure proper bolt tension in high-strength structural bolting applications. These washers are designed with raised protrusions that compress when the bolt is tightened, allowing engineers and installers to visually verify that the required clamping force has been achieved.

DTI washers are widely used in steel structures, bridges, heavy machinery installations, construction projects, and infrastructure works where accurate bolt tension is critical for safety and structural integrity.

Manufactured from high-strength hardened steel, the M20 DTI washer provides reliable load indication and improves the efficiency of bolted connections. It helps eliminate the need for torque-based tightening methods and ensures consistent fastening performance.

This washer is compatible with M20 high tensile structural bolts and is commonly used in preload-controlled bolting systems.