Product Description
13/16" BA high speed steel circular split dies for cutting new external British Association threads.
These UK made high quality HSS round dies are suitable for producing new BA external threads on suitable bar, rod and studding. The circular split die design allows adjustment when used with a suitable die holder, making them useful for model engineering, electrical work, instrument repairs, workshop maintenance and general BA thread cutting applications.
- Thread form: BA / British Association
- Die outside diameter: 13/16"
- Material: High speed steel / HSS
- Die type: Circular split die / round die
- Use: Making new external threads
- Thread sizes available: 0BA through to 12BA
- Made in the UK
| Thread Size | Die OD | Pitch | Approx. TPI | Thread Form | Material | Die Type |
|---|---|---|---|---|---|---|
| 0BA | 13/16" | 1.00mm | 25.4 | BA | High Speed Steel | Circular Split Die |
| 1BA | 13/16" | 0.90mm | 28.2 | BA | High Speed Steel | Circular Split Die |
| 2BA | 13/16" | 0.81mm | 31.4 | BA | High Speed Steel | Circular Split Die |
| 3BA | 13/16" | 0.73mm | 34.8 | BA | High Speed Steel | Circular Split Die |
| 4BA | 13/16" | 0.66mm | 38.5 | BA | High Speed Steel | Circular Split Die |
| 5BA | 13/16" | 0.59mm | 43.1 | BA | High Speed Steel | Circular Split Die |
| 6BA | 13/16" | 0.53mm | 47.9 | BA | High Speed Steel | Circular Split Die |
| 7BA | 13/16" | 0.48mm | 52.9 | BA | High Speed Steel | Circular Split Die |
| 8BA | 13/16" | 0.43mm | 59.1 | BA | High Speed Steel | Circular Split Die |
| 9BA | 13/16" | 0.39mm | 65.1 | BA | High Speed Steel | Circular Split Die |
| 10BA | 13/16" | 0.35mm | 72.6 | BA | High Speed Steel | Circular Split Die |
| 12BA | 13/16" | 0.28mm | 90.7 | BA | High Speed Steel | Circular Split Die |
Please note: BA threads are specified by pitch in millimetres. The TPI figures above are approximate equivalents for reference only.

| A | B | C |
| 10BA | 13/16" | 0.35 |
| 9BA | 13/16" | 0.39 |
| 8BA | 13/16" | 0.43 |
| 7BA | 13/16" | 0.48 |
| 6BA | 13/16" | 0.53 |
| 5BA | 13/16" | 0.59 |
| 4BA | 13/16" | 0.66 |
| 3BA | 13/16" | 0.73 |
| 2BA | 13/16" | 0.81 |
| 1BA | 13/16" | 0.9 |
| 0BA | 13/16" | 1 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.