1/4" BSPT Somta High Speed Steel Tap 1436300 these are lighter duty counters

these are lighter duty counters than the IVO brand

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1/4" BSPT Somta High Speed Steel Tap 1436300 these are lighter duty countersTaper thread, British Standard Pipe Taper thread (BSPT), whose diameter increases or decreases along the length of the thread. For producing precision threads by hand tapping, for starting threads either second or bottoming taps should used after to achieve desire thread depth. Taper pipe reamer recommended prior to tapping Rc (BSPT) thread forms General purpose use Threads per inch 19 Overall length 67mm Cutting length 19mm Drill diameter 11. 2mm