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I highly recommend you using the AFFDL-TR-69-42 lug method. I believe that the grumman manual also assessed lugs with this methodology. I know the OEM's put strict limits on ratio ranges- more restrictive than bruhn. Many times the test lab will do a few points and say use xx curve valid for...

These are nuts for head stud conversion. Fits a 6BT cummins engine aka Dodge diesel. 125 ft-lb torque, running 60 psi of boost.

I wish I could fill in details... I begged the guy for a defective nut. Vendor fedex him new hardware and he sent it all back. So, just speculation unless the manufacture admits to the problem. If I do happen to get a nut- I'll take a close up pic at work with inspection equipment and get a...

I grabbed this off an hot-rod website. It was holding a cylinder head on .. running high boost. Failure mode looks strange to me for a nut. I expect shearout of either nut or stud threads. Reading around my only viable scenerious are .. 1) just wasn't heattreated and residual forming...

I would use an epoxy. An unfilled on will not be thicksotropic (sp?). Epoxies get good strength even with some gaping. You can put a micro-sphere filler in the resin. Not that I would use this system- but google on "west epoxy system". They have many examples on how their system has been...

I think my advisor at the University worked with someone on a MS thesis on the topic. From memory. First, lug bolts are way over designed for the loads- due to shop, abuse, liability. 2) I think OE's official stance is lug bolts/nuts are to be replaced not reused- then the coating is intact...