Step motor bolt question
Well, my step motor (Kwikee) sheared all 4 of its mounting bolts a week or so ago while I had just arrived for a rally. We made do with a short ladder and once home I have managed to remove all 4 studs using easy-outs (3 of which actually came out fairly easily, the 4th, well that lived up to the "not so easy" easy out reputation, but I did succeed). I cleaned out the bolt holes with a tap (they are 1/4-20 bolts) and I am now ready to replace them. Any recommendations for Bolt type. I had considered using a grade 8 bolt as they are stronger/hardened, but the thought of those shearing and needing to drill out a hardened bolt is not making me happy...but if it never broke again of course that would be Ok...
Second question. The motor housing is aluminum, and of course the bolts will be steel...any thoughts on something to coat the bolt with to resist the inevitable electrolytic corrosion?
2005 Airstream 396 XL Land Yacht with Cat 330 C7
2016 Grand Design Solitude 369RL-R 5th Wheel