Thread Forming, Extension Tap M5 x 0.8, BD8, Bright/Uncoated, High Speed Steel,6″ OAL, 7/8″ Thread Length Tap Type Thread Forming Thread Size (mm) M5x0.8 Thread Standard Metric Coarse Thread Limit D8 Thread Pitch (mm) 0.80 Thread Length (Inch) 7/8 Thread Direction Right Hand Overall Length (Inch) 6 Overall Length (Decimal Inch) 6.0000 Chamfer Bottoming Material High-Speed Steel Square Length (Inch)1/4 Class Of Fit 6H Coating/Finish Bright/Uncoated.