Sowa 5/8"-18 HSS Bottom Hand Tap – 5/8"-18 Thread, 4-Flute Bottom Chamfer, Bright Finish, 3-13/16" Overall Length

The Sowa 5/8"-18 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 5/8"-18, right-hand thread — standard thread size for small screwsBottom-chamfer (bottoming) design allows threads to be cut to the full depth of blind holesHigh-speed steel (HSS) construction with bright finish — durable and suitable for ferrous and non-ferrous materials4-flute straight-cut geometry for efficient chip clearance and smooth tapping performanceCompact overall length of 3-13/16" makes it practical for hand tapping in confined or tight-access work areas

• Thread size 5/8"-18— widely used thread size for machine screws and standard fastening applications
• Bottom-chamfer (bottoming) style — makes it possible to thread all the way to the bottom of blind holes or maximize thread engagement depth.
• High-speed steel (HSS) with bright finish — reliable durability and consistent performance when tapping steel, aluminum, and non-ferrous alloys.
• 4-flute straight-cut geometry — provides smooth cutting action and efficient chip evacuation to reduce risk of tap breakage.
• 3-13/16" overall length — compact size makes this tap convenient for hand-tapping and for use in workpieces or fixtures with limited access.