- Pair of 5/16″ High speed steel threading tool bits
- 60 Degree high quality steel center gage
- Bits are 5/16″ wide by 3 1/8″ long – for internal and external threading
Threading tool bits and center gage kit.
The bits are 5/16″ High Speed Steel tool bits pre-sharpened for external and internal threading. Both bits have 55 degree and 60 degree cutting ends.
Used for grinding and setting screw cutting tools. American Unified National Standard – 60 degrees. Scales are used to determine number of threads per inch. Made of hardened spring tempered steel, with a protective satin chrome finish. All gaging surfaces are precision ground.
