The Sowa 1/4"-20 HSS Bottom Hand Tap is engineered for creating full-depth internal threads to the bottom of blind holes or when maximum thread depth is required. Constructed from high-speed steel with a bright finish and straight flute geometry, this bottom-chamfer tap is ideal as the final pass in a taper- or plug-started hole. It offers reliable, concentric thread cutting for ferrous and non-ferrous materials, making it well-suited for small machine screw applications in metalworking, maintenance, repair, and general shop work.
Tap size 1/4"-20, right-hand thread — standard thread size for small screws
Bottom-chamfer (bottoming) design allows threads to be cut to the full depth of blind holes
High-speed steel (HSS) construction with bright finish — durable and suitable for ferrous and non-ferrous materials
4-flute straight-cut geometry for efficient chip clearance and smooth tapping performance
Compact overall length of 2-1/2" makes it practical for hand tapping in confined or tight-access work areas