Dormer E651 UNC Spiral Flute Tap & Drill Set 5/16 UNC Sprial Flute

The 5/16 UNC spiral flute tap and drill set provides reliable threading for applications requiring this popular intermediate size. Producing a 6.6mm thread diameter with 21mm threading length, this combination tool serves well in equipment assembly, automotive applications and general metalworking where five-sixteenth inch UNC threads are needed. The integrated drill-and-tap design saves considerable time on site by eliminating tool changes. Constructed from high-speed steel with steam tempering, this tool delivers consistent cutting performance throughout its working life. The 8mm connection diameter fits securely in standard power drill chucks, whilst the two-flute spiral pattern removes swarf efficiently during operation. Both professional tradespeople and home workshop users will appreciate the convenience of creating accurate threads without switching to separate tapping equipment. Features and Benefits: • Single-pass threading dramatically reduces job completion time • Steam-temp