3D Printed Custom Screw Design -- 2

I'm seeking a designer to create a precise 3D model for a custom screw. Requirements: - Overall length: .850 inches - Head diameter: .730 inches - Head height: .300 inches - Hex size: 5/16 or 1/4 inch... (Budget: $125 - $250 USD, Jobs: 3D Modelling, CAD/CAM, Mechanical Engineering, Product Design, Solidworks)