hi everyone just bought a used fisher mm. plow for my 94' f250 and need to know what bolts to get for the frame attachment plates, grade 5 or 8 ?
i was on fisher's web site but could not find that info, also dont want to wait till the last minute to install it as it needs a little work (does not raise) thanks...bill

 

Dont know what is correct for the job, but if I had to buy bolts, I would get grade 8.
I use grade 8 on everything I do.

 

Another vote for grade 8. Thats what I use on my 8.5 Meyer.

 

grade 8 my neighbor but a plow on and hit a bank backed away and had to put his whole assy on twice it dropped to the ground.

 

sorry double post

 

actually you should go to your local fisher dealer and get the correct bolt kit for your application...they run about $25 which is only a few $$ more that home depot....Most of the trucks need the bolts with the long rod welded to them because you have to feed them down the frame chanel and cant do it without the long rods. Worth the few extra $$ in my opinion to know you will have every bolt exactly the right size....might save you 5 trips back and forth to depot....

 

All the hardware for my plows have always been grade 8. I use the yellow zinc plated stuff and jamb nuts from Fastenal.

If someone snapped multiple grade 8 bolts and left their mount in a snowbank, I'd like to see what they looked like when they were admitted to the hospital, cuz they would have had to hit something pretty damn hard... Something tells me there's more to the story...

 

O.k.
Here is the helpful tip of the day from my vast warehouse of helpful tips.
If you are trying to fish bolts down a frame or some similar type job.
The tip of the day is take a heli-coil spring and a piece of piano wire or fishing rod steel leader and attach it to said Helli-coil, thread bolt into Helli-coil, use the wire attachment to fish "like an electrician", pull Thur frame, unscrew assembly from bolt while holding it as to not drop it into the frame, attach nut, and tighten, next,...

There is a million other ways to do it, but the Helli-coil is the only thing that I found that is easy to fit Thur a hole that is bolt sized, and not having to screw around tape and pieces of mechanics wire while trying not to drop the bolt back into the frame is worth making the setup.
After you make this tool you will have it forever, make one of all the usual sizes.

 

Ok, but how does that keep the bolt head from spinning when you try to tighten the nut? Or vice versa, when installing the nut on the inside of the frame, you need to keep it from spinning when tightening.

Most plow mount hardware kits include bolts or nuts with rods welded on for this purpose. Many dealers make their own by welding stock or scraps to grade 8 hardware as the manufacturers charge way too much for them. On some mounts (like my narrow frame blizzard mount), the nuts only only need to go in 8-10 inches, in which a pen extension magnet works great to get the bolt started, then slip a wrench in and run 'er home...

 

hey thanks for the info, at first i was going to measure everything up but buying a kit through fisher sounds like less work. i was on fisher's website and other plow parts websites and dident see any hardware kits listed, at least for my older truck.
ill try them first. thanks again bill