1/4-19X1-1/2 BSPP BRITISH PIPE DIE1/4-19X1-1/2 BSPP BRITISH PIPE DIE 243811, STRAIGHT OR PARALLEL, ROUND ADJUSTABLE, HSS This is a HSS, round adjustable type, British BSPP Threading Die. This designation stands for British Standard Pipe Parallel, or straight, pipe thread. It comes from the factory preset to the specific size indicated. DO NOT CHANGE unless you want to cut oversized or undersized threads by just turning the adjusting screw in or out! They are designed for cutting external threads, either by hand, with a die stock, floating die holder, or by chucking up on a lathe. Dies are manufactured with a 2-3 thread chamfer on the front face and a 1 to 1-1/2 thread chamfer on the rear.
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