产品描述：
Sherwood Solid Counterbore HSS-E
Used for milling of pre-drilled holes to allow bolt or cap head screws to lie flush with the component surface. Spiral, 3 flute. Medium duty. Manufactured to BS328:5:1983.
For all dimensional specifications please refer to our catalogue.
Spiral 3 Flute Screwed Shank
Spiral, 3 flute. Medium duty. Sizes: M3, M4, M5, M6, M8, M10, M12.