DTI Washer, Galvanized
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DTI Washer, Galvanized

ASTM F959, Type A325 Direct Tension Indicator (DTI) washers are used to indicate the correct bolt tension when an A325 structural bolt is installed. The DTI is placed under a hardened surface such as a bolt head, nut, or hardened washer, with the bumps facing away from the structural steel. As the bolt is tensioned, the clamping force flattens the bumps, reducing the gap. The operator then checks the gap between the bumps to ensure the bumps have been crushed to within a determined tolerance, which results in the bolt reaching its proper tension. Dimensional specifications are governed by ASME B18.2.6. Available in mechanical galvanized finish, which provides a corrosion resistant zinc coating.

DTI Washer, Galvanized
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Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM
1/2 0.54 1.0630 0.0970 WLOD050DTI-U In Stock $0.82573/EA EA
5/8 0.6650 1.3130 0.1220 WLOD062DTI-U In Stock $0.91537/EA EA
3/4 0.79 1.4680 0.1220 WLOD075DTI-U In Stock $0.96609/EA EA
7/8 0.9150 1.75 0.1360 WLOD087DTI-U In Stock $1.13861/EA EA
1 1.04 2.0 0.1360 WLOD100DTI-U In Stock $1.79086/EA EA
1 1/8 1.1650 2.25 0.1360 WLOD112DTI-U In Stock $2.14703/EA EA
1 1/4 1.29 2.5 0.1360 WLOD125DTI-U In Stock $2.56341/EA EA
1 3/8 1.4150 2.75 0.1360 WLOD137DTI-U In Stock $3.21488/EA EA
1 1/2 1.54 3.0 0.1360 WLOD150DTI-U In Stock $5.2427/EA EA