Check the listing for details. Spiral Flute Thread Taps 1/4-20 UNC 2B Screw Threading Tap Tapping Tools. Condition: New. Listed at 15.19 USD. Thread Size: 1/4-20 UNC (Right Hand)Accuracy: 2BThread Length: 20.8mm / 0.82"Total Length: 68mm / 2.68"Square Shank Width: 4.5mm / 0.18" (Round Shank Dia.: 5.8mm / 0.23")Material: 6542/M2 High Speed Steel (HSS)Finish: UncoatedPackage Content: 1pcs x Spiral Flute Thread TapDescriptions:Thread tap features spiral flutes, clear threads without burrs, and right hand thread cutting. Spiral flutes are fully ground to provide upward chip removal. Flutes on the screw tap help to remove chips and debris from the hole.6542 (M2) high speed steel screw taps run at high speeds and generate threads quickly and efficiently, offering high hardness, wear resistance, and good toughness. Uncoated taps feature just the base substrate without any additional coatings, great for a wide range of applications.