This is a double-threaded stud for many different applications for many different GM vehicles. This has a flanged hex nut in the center for tightening this. This has locktite on the long threaded side. These are commonly used for many catalytic converters and exhaust systems. You will receive 1 stud per order. (Contact us for a bulk pricing if you want to purchase a lot of these studs)

M8 X 1.25 X 25 + M8 X 1.25 X 15

Thread Diameter: M8

Thread Pitch: 1.25mm

Length: 48mm (overall)

Thread Length: 25mm + 15mm

Hex Head Size: 13mm

GM Part # 11561601

Alternate GM Part # 12555971

Item is number 29 in the GM diagram.