Used for fastening switches onto a pattress or switchbox.
| BA Thread Diameter | Threads Per Inch | Tap Drill Diameter (mm) |
| 1BA | 28.2 | 4.50 |
| 2BA | 31.4 | 4.00 |
| 4BA | 38.5 | 3.00 |
Estia Screw 2BA TR 3035
Model Number: TR 3035
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Used for fastening switches onto a pattress or switchbox.
| BA Thread Diameter | Threads Per Inch | Tap Drill Diameter (mm) |
| 1BA | 28.2 | 4.50 |
| 2BA | 31.4 | 4.00 |
| 4BA | 38.5 | 3.00 |
