3/8" Dia, 5/8" LOC, 4" OAL Fullerton Square End Mill, manufacturer part number 38227.
Specifications: Cutting Diameter: 3/8 in (0.3750 in, 9.53 mm); Length of Cut: 5/8 in (0.6250 in, 15.88 mm); Overall Length: 4 in (4.0000 in, 101.60 mm); Reach: 1-1/8 in (1.1250 in, 28.58 mm); Neck Diameter: 0.3600 in (9.14 mm); Shank Diameter: 3/8 in (0.3750 in, 9.53 mm); Number of Flutes: 2; Helix Angle: 45 degrees; Double Ended: No; Length Type: Long Reach; Coolant Option: External Coolant; End Type: Square; Hand Direction: Right; Helix Direction: Right.
Coating/Finish: Uncoated. Unit of measure: Inch.