Chrome lug nut for alloy or mag style of wheels with a built in washer. This lug nut will fit alloy wheels found on later 280z and 280ZX cars as well as some of the earlier alloy wheels. These lug nuts have a total length of 1.5" and a shank diameter of .720" (18mm). standard M12-1.25 threads. There are two different sizes of mag style lug nuts, so please check the measurements to be sure this size is correct. The factory service manual torque spec for the nut is 60 lb ft.