Those are some good suggestions. Yes it is a trim strip at the rear of the bedwood. None of the bedwood holes are square and this strips bolts do not go through the wood. The ten bolts go through the strip, the end hole on each rub rail, and the lower ledge the wood rests on. I measured the countersink angle on the bolt and it is 114 degrees. I found a countersink hex bolt and it measures at 70 degrees, the head is smaller, but it would work and could be filled in for a smooth finish. I like the way the original bolts blend in. I went by Fastenal, but they don’t have any ¼” plow bolts longer than 5/8” listed and they show no suppliers for them. I tried to search farm implement parts, but those seem to be listed by application. If I knew of a specific piece of equipment that uses these, I could reference it. I just need to find a bolt that looks right when installed. I think I’ll get a flat head carriage bolt and chamfer the edge so it sits flush in the 114 degree countersink. Seems like the easiest solution. I find these bolts are used on garage doors.
