Super Duty & Heavy Duty1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines
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No he said hanger bolts. As far as the UBOLTS in the pictures, they are for mockup, to see exactly how much block I needed. Traction blocks are being built as we speak, and will be installed with 3/4" UBOLTS,
PMF 2011 Rear Leaf Spring Conversion
AMP Research Steps
Factory 20" Harley Wheels w/305/55/20 Terra Grapplers
Mods... Im not here to push my products, if you find my post inappropriate, please feel free to edit it as you feel necessary.
Members... Im not here to argue or get in a forum fight with anyone. I build and refine my parts based of you alls input. Im not deaf to suggestions and opinions like some companies. You all have some of the best "untainted" feedback, so Im more than happy to listen!!
In regaurds to the 3/8"s bolts not being strong enough... Although it a appears to be a week point, it is not. First off, take into account the design of the bracket. The factory bracket is rivet to the side of the bracket. So the entire load of the spring is put directly onto the hanger rivets. My bracket is designed to wrap around the side of the frame and rests on the bottom of the frame rail. So in effect, force is applied to frame itself, instead of the bolts themselves.
BUT, lets leave this part of the design out of the equation, as if it did not exist. Factory, the hangers are held in place with six 1/2" rivets. This equates to a total of surface area of 1.1781 of fastener. While ten 3/8" bolts offer a total surface area of 1.1045. Although the bolts offer a VERY slight difference, they are also grade 8. Frame hot rivets in automotive applications are not heat treated. So in actuality, the fastening strength of the bolts is far greater than the hot rivets.
On initial glance, I would have prefered to use 1/2" hardware. However I took into account the fact that I would prefer my products could be installed by average shade tree mechanics without too much hassle. The most common household drill has a 3/8" chuck. So using 1/2" hardware and expecting the at home guy to drill 1/2" holes would be difficult. Do-able.... yes.
So... I hope I have helped some.... Cheers everybody!! Back to welding for me!!!
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