5/16 - 24 Size x 1.1250" (1-1/8) Thread Length x H3 Limit x 0.3180" Shank DIA, High Speed Steel - 4 FL - TiN Coated
5/16 - 24 Size x 1.1250" (1-1/8) Thread Length x H3 Limit x 0.3180" Shank DIA, High Speed Steel Hand Tap - Left Hand, 4 Flutes, TiN Coated