1/4-20 Size x 1.0000" (1) Thread Length x H3 Limit x 0.2550" Shank DIA, High Speed Steel - 3 FL - Zrn Coated
1/4-20 Size x 1.0000" (1) Thread Length x H3 Limit x 0.2550" Shank DIA, High Speed Steel Spiral Flute - Semi-Bottoming Tap, 3 Flutes, Zrn Coated