Hillman 1/2 in. Dia. x 4-1/2 in. L Zinc Plated Steel Hex Bolt 25PK (1-BOX) Hex bolts are machine bolts that have been designed to adhere facing materials to prevent shear movement; specifically for use in wood to wood, wood to metal, or metal to metal applications. Zinc, grade 2 hex bolts are recommended for most general uses and are corrosion resistant for typical use. Be sure to pre-drill any holes and to use washers and nuts that are a similar grade and finish. * Machine bolt designed to fasten facing pieces of wood and/or metal Partially threaded shank allows for a stronger grip between objects and less shear movement Grade 2: appropriate for most general use (match with Grade 2 washer) Specifications HX BOLTS USS Z 1/2X4 1/2 Brand Name: Hillman Head Diameter: 1/2 in. Length: 4-1/2 in. Finish: Zinc Plated Material: Steel Product Type: Hex Bolt Number in Package: 25 pk Grade: 2 Grade Thread Type: Coarse Packaging Type: Boxed Unit of Measurement: Metric Low Carbon