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Load Indicating Washers

Load indicating washers (LIW) are used to develop the correct tension when installing A325 or A490 structural bolts. Standard DTIs and Squirter™ DTIs are made to ASTM F959.

Stock

Diameters: 1/2" - 1-1/2"
Origin: Domestic
Finish: Black and mechanically galvanized

Dimensions

Bolt SizeA325A490A325 or A490
BNumber of ProtrusionsCBNumber of ProtrusionsCAPTD* Max
Max ODThickness After CompressionMax ODThickness After CompressionID Max
1/2 1.187 4 0.120 1.375 5 0.120 0.527 0.788
5/8 1.375 4 0.140 1.625 5 0.140 0.658 0.956
3/4 1.625 5 0.140 1.750 6 0.160 0.790 1.125
7/8 1.875 5 0.160 2.000 6 0.180 0.921 1.294
1 2.000 6 0.180 2.250 7 0.180 1.052 1.463
1-1/8 2.250 6 0.180 2.500 7 0.180 1.183 1.631
1-1/4 2.500 7 0.180 2.750 8 0.180 1.315 1.800
1-3/8 2.750 7 0.180 3.000 8 0.180 1.446 1.969
1-1/2 3.000 8 0.180 3.250 9 0.180 1.577 2.138

Dimension specifications per ASTM F959.
*Protrusion Tangential Diameter