You are correct in your assumption about the Tractor Supply bolts. I had the same issue build my bed and replacing bolts on my bumpers. The standard carriage bolt you get at Tractor Supply or Home Depot do not have the same size square as the factor original carriage bolts for your AD truck. I bought the bolt kit from LMC for the strips and angles and they fit perfect. The HD carriage bolts did not. For the bumpers I bought the HD carriage bolts (a lot cheaper) and ground the square down until it fit.


Dave from Northern Kentucky
My 54 3100