Brand Name: Hillman *Finish: Zinc *Material: Steel *Thread Type: Coarse *Drive Type: Hex *Product Type: Bolt *Head Diameter: 3/8-16 in. *Overall Length: 3-1/2 in. *Number in Package: 50 box *Grade: 2 *Bolt Length: 3.5 mm *Head Style: Hex *Color Family: Gray/Silver *Unit of Measurement: SAE *Packaging Type: C-Pack *Drive Style: Hex *Product Name: Hex