Features The bright finish on these taps provides a smooth, polished surface. Thread Size / M22x1.5 Thread Standard / Metric Fine Tap Chamfer / Plug Tap Material / High Speed Steel Tap Finish / Bright (Uncoated) Thread Length / 2 3/16 in Overall Length / 4 11/16 in 75% Thread Drill Size / 20.50 mm Thread Limit / D6 Thread Direction / Right Hand Number of Flutes / 4 Tap Length Standard / USCTI Tap Shank Standard / USCTI 55% Thread Drill Size / 20.90 mm 65% Thread Drill Size / 20.75 mm Extended Neck / Yes Measurement System / Metric Series / 20691 Shank Dia. / 11/16 in Shank Length / 2 15/32 in Shank Type - Machining / Straight Spiral Direction / Neutral Square Size / 0.5230 in Standards / USCTI Tap Grouping / Individual Tap Style / Straight Flute (Hand) Thread Limit / Class of Fit / D6 Thread Pitch / 1.50mm