1/4" BSPF HSS Bottoming Tap Few
Parallel (straight) thread, British Standard Pipe Parallel thread BSP; originally also known as British Standard Pipe Fitting thread/BSPF which have a constant diameter. For producing precision threads by hand tapping, ideal for finishing blind holes.
General purpose use
Through & blind holes
Suitable for both hand and machine operations
Threads per inch 19
Drill diameter 11.8mm