Alfa Tools ST66568 20 x 2.50 mm HSS Metric Screw Thread Insert Tap

Screw Thread Insert Tap, For Size 20mm x 2.50 Helical Coil Thread Insert, Plug Style, High Speed Steel, Made in USA, Use 20.5mm Drill, 1 per Pack. Alfa Tools ST66568 20 x 2.50 mm HSS Metric Screw Thread Insert Tap