This is a pack of ten (10) retainer washers for nuts for many different applications for many different GM vehicles. You will receive 10 retainers per order. These retainer washers can be pushed onto bolts to hold them in place until a nut can be screwed onto the threads. This inner hole is for size M6 bolts. (Contact us for a bulk pricing if you want to purchase a lot of these retainers)

M6 X 1/2" O.D.

Thread Diameter: M6

Outside Diameter: 1/2"

GM Part # 11505483

Item is number 31 in the GM diagram.