M12 x 1.50 metric high tensile steel competition wheel studs, manufactuured by Grayston Engineering. These studs feature an M12 x 1.50 thread, with a length from the underside of the head, to the end of the thread of 51mm, but more importantly, has a splined section to press into your hubs with a 14.3mm diameter. These studs are stated as 'GM' type studs as various Vauxhall models had the same thread pitch and spline diameter. So as well as Vauxhall's they are also useful to fit other vehicles, Ford included, especially where the original studs have become loose in their hubs or driveshaft holes, they are also interchangable with various Japanese models, to change from a 12 x 1.25 thread, to the coarser M12 x 1.50 thread as desired.
Priced EachCompetition Specification Wheel StudsM12 x 1.50 Thread 51mm Main Stud LengthStud Splined Section Diameter of 14.3mmInterchangeable with Various GM VehiclesPress into Hubs using Stud Lock Compound