This is a pack of two (2) hex head nuts for GM vehicles. These are for many different applications for many different GM vehicles, although these are most commonly used as the nut for the lower ball joints and control arm mounting nuts. You will receive 2 nuts per order. These have a flanged, built in washer that spins freely and locktite on the threads to keep the nut from backing off. (Contact us for a bulk pricing quote if you want to purchase a lot of these nuts)

M16 X 1.5 X 21

Thread Diameter: M16

Thread Pitch: 1.5mm

Washer(flange) Diameter: 35mm

Head Size: 29mm

Height: 21mm (overall)

GM Part # 11561830

Alternate GM Part # 11519880

Manufacturer Part # 05SCN

Item is number 33 or 21 in the GM diagram.