5/8" Dia, 3-1/4" LOC, 6" OAL M.A. Ford Square End Mill, manufacturer part number 27862560B.
Specifications: Cutting Diameter: 5/8 in (0.6250 in); Length of Cut: 3-1/4 in; Overall Length: 6.0000 in; Shank Diameter: 5/8 in; Number of Flutes: 5; Helix Angle: 40 degrees; Shank Type: Straight; End Type: Square.
Material: Solid Carbide. Coating/Finish: ALtima Blaze. Series: TuffCut XT. Unit of measure: Inch.