What size is the chevy hhr lug nut ?

The Chevy HHR lug nut thread size is m12 X1.50 and hex size is 19 mm. A lug nut is a nut fastener with one rounded or conical (tapered) end, used on steel and most aluminum wheels. A set of lug nuts is typically used to secure a wheel to threaded wheel studs and thereby to a vehicle's axles.If You get aftermarket wheels, make sure You have lug nuts that will fit properly. Most OE lug nuts are not designed to fit aftermarket wheels. That's why we recommend purchasing a wheel installation kit to ensure the lug nuts match Your wheels. Lug nuts must be torqued to the manufacturer's recommended values, and they must be re-torqued to those values after driving approximately 50 to 100 miles on Your new tires after the tire service.