Nope... metric: M8 x 1.25 - yep, get studs/nuts, you can get 'em at Ace Hardware.... at least at MY Ace... :smile: Not sure exact length.... they carry them in several lengths, though..... brackets, etc. go on top of the 1st nut holding the header on, then are nutted on top.... ie... header, nut, bracket, nut..... for both the alt bkt, and the dipstick tube....