- Thread type: BSW
- Flank angle: 55 °
- Tool material: HSS
- Standard: EN 22568
Closed, pre-slit form; with tapered lead chamfer on both sides for easy start to the threading action and clean swarf evacuation in the direction of cutting. 1¾ turns lead chamfer.
For Whitworth threads to BSW standard BS84 in the tolerance field “medium”.