Greenfield Tap & Die Co.Clawson, Chris2020-06-212020-06-21April 10 2https://dspace.montaguearchive.org/handle/MHS-01376/3794Editor's Note: Flute grinding a tap blank. Flutes are ground into tap blanks to allow for chip clearance as the tap performs its primary function of cutting threads into various components. The threads will be cut into the blank(s) following this operation.