5/8" Dia, 5/8" LOC, 3" OAL M.A. Ford Square End Mill, manufacturer part number 19262500A.
Specifications: Cutting Diameter: 5/8 in (0.6250 in); Length of Cut: 5/8 in; Overall Length: 3.0000 in; Shank Diameter: 5/8 in; Number of Flutes: 4; Helix Angle: 20 degrees; Shank Type: Weldon Flat; End Type: Square.
Material: Solid Carbide. Coating/Finish: ALtima. Series: TuffCut DM. Unit of measure: Inch.