Hitch Pin Pin Diameter 3/8 in Shank Diameter 3/8 in Shank Length 4 in Pin Type Detent Material Steel Material Grade/Class Grade 1038/Grade 4140 Finish Zinc Plated Usable Length 4 in Product Type Hitch Pins System of Measurement Inch Maximum Hole Size 0.206 in Minimum Hole Size 0.156 in Head Diameter 1/8 in Material Quality Standards Not Applicable Dimensional Standards Not Applicable Pack Size Small Pack Head Diameter Tolerance +0.05/-0.00 in