Navair Brass Gear 394713-11 also 394713PC11. NSN 3020-00-378-6406 SPECS: AAQL Body Style Webbed, offset, with lightening holes ABSX Attachment Method Mounting hole AGJS Pitch Diameter 3.5000 inches minimum and 3.5005 inches maximum AJLA Teeth Quantity 84 ANTP Bore Style W/counterbore both ends BDZQ Backlash Designation Grade E CMLK Mounting Hole Thread Series Designator Unc axially through body, first end CMLM Mounting Hole Thread Quantity PER Inch 40 axially through body, first end CTQY Mounting Hole Type AND Quantity 3 threaded axially through body, first end CWFR Nominal Overall Length 0.593 inches CWNH Tooth Form Standard CWPP Pressure Angle 14.5000 degrees CWQL Nominal Distance Between Body Face AND Protruding HUB END 0.250 inches first end CWQL Nominal Distance Between Body Face AND Protruding HUB END 0.140 inches second end CWRM Face Nominal Width 0.125 inches CWRS Bore Nominal Diameter 1.000 inches both ends CWTB Counterbore Nominal Depth 0.250 inches both ends CWTX HUB Nominal Diameter 1.375 inches second end CWWH END Nominal Length 0.250 inches first end CWZN Bolt Hole Circle Nominal Diameter 3.093 inches axially through body, first end STYL Style Designator Protruding hubs WRD19 14051