ASTM

| Standard | Description |
| ASTM F2437/F2437M | Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs |

| Standard | Description |
| ASTM F2437/F2437M | Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs |