4-40 Tap and #43 Drill Bit Set, Ti-Coated M2 HSS #4-40 UNC Tap and 2.3mm Straight Handle Drill Kit SAE #4-40 Tap & #43 Drill
A compact 2-piece set for #4-40 UNC threading: includes one Ti-coated M2 HSS 4-40 tap and one Ti-coated #43 (2.3mm) drill bit for prepping holes in a range of metals.