This is a big, rectangular head bolt for GM vehicles. This bolt has a washer. This bolt comes with locktite on the threads. This bolt also has splines on the shank to keep it from spinning. This is for many different applications for many different GM vehicles, although it is commonly used as a front strut to hub mounting bolt. (Contact us for a bulk pricing if you want to purchase a lot of these bolts)

M16 X 2.00 X 79

Thread Diameter: M16

Thread Pitch: 2.00mm

Washer Diameter: 32mm

Head Size: 31mm X 19mm

Length: 79mm (overall)

Shank Length: 40mm

GM Part # 11519985

Alternate GM Part # 11518242

Manufacturer Part # S167684

Item is number 43 in the GM diagram.