Compare Maximum number of 4 items selected ACDelco Hex Head Bolt - 11519111 Part #: 11519111 Line: ACD ACDelco Hex Head Bolt 7 Year Limited Warranty Material: Steel Head Type: Hex Head Size (in): 1/2 Inch Head Size (mm): 13mm Thread Length (in): 13/16 Inch Thread Length (mm): 20mm Critical Length (in): 4-1/16 Inch Critical Length (mm): 103mm Show More Show Less