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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 Size | A325 | A490 | A325 or A490 | |||||
|---|---|---|---|---|---|---|---|---|
| B | Number of Protrusions | C | B | Number of Protrusions | C | A | PTD* Max | |
| Max OD | Thickness After Compression | Max OD | Thickness After Compression | ID 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