GUHRING 9039100095250 Sp Flute Tap, Mod Bottom, 3/8 Inx16, TiN. More details: Spiral Flute Tap, Right Hand, Tap Style Modified Bottoming, Size 3/8 In., Pitch 16, Material Powdered Metal Cobalt, TiN Finish, Overall Length 2-15/16 In., Thread Length 5/8 In., Shank Dia. 0.381 In., Number of Flutes 3, Thread Type UNC, Pitch Diameter Limits 2B, List Number 3910, Standards ANSI