ACDelco Multi-Purpose Bolt - 11589351 Part #: 11589351 Line: ACD ACDelco Multi-Purpose Bolt 1 Year Limited Warranty Diameter (in): 1/2 Inch Diameter (mm): 14mm Material: Steel Head Type: Hex Overall Length (in): 1-5/8 Inch Overall Length (mm): 42mm Head Size (mm): 21mm Thread Diameter (in): 9/16 Inch Thread Length (in): 1 Inch Thread Length (mm): 25mm Thread Diameter (mm): 14mm Color/Finish: Zinc-Plated Show More Show Less