This is a hex head bolt for GM vehicles. These are for the engine and transmission mounts for many different GM vehicles. This is a big bolt that mounts vertically through the frame rail for the engine and transmission mounts in these vehicles. (Contact us for a bulk pricing quote if you want to purchase a lot of these bolts)

M12 X 1.75 X 175mm

Thread Diameter: M12

Thread Pitch: 1.75mm

Length: 175mm (overall)

Shank Length: 125mm

Head Size: 18mm

Grade: 10.9

GM Part # 11609299

Item is number 15 in the GM diagram.