So whats shoulder length got to do with knurl length? So the ARP part has knurls that go from under the head and are a tickle under 3/4 long, Yet the stock one has about 1/4' of knurl. And your gonna say that these won't be seated into the hub as deep. Considering they go clear through the hub, how much deeper can they go? On your example of the stock stud , please take a close look at the shoulder area between the knurl and when the threads actually start.You do realize that this section of the shoulder doesn't even come into contact the hub,right? When you installed these ARP studs into your hubs , you found that it wouldn't work? I can assure you that there is WAY more knurl to hub contact area with the ARP stud than the factory one.
If you don't like em' don't use em'. I just thought that it would be a good thing to actually post a part# for a longer front stud that fits the Kelsey Hayes front rotor and works.
I should contact my customer and tell him that although your on your 3rd tank of gas and have been kicking the crap out of your new toy daily, that your front studs aren't seated deep enough.... :argue:
Thanks for your post...very helpful