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A little newer set up but some great info: I bought the main bed-to-frame mounting bolts and washers from Mar-K in Oklahoma. They are 1/2" x 5.5" long with special Phillips button heads that fit their own tapered washers. I used their instructions and counter-sunk the washers using both a Forstner bit and spade bits to get the taper to fit. The bed wood bolts I used were all stainless 5/16" carriage bolts 1 1/2" long, and I also used stainless 5/16" fender washers with them where required. If you are using stainless hardware you must use antiseize or you will have a bad time...little bolts like 5/16" will gall very easily.
A little newer set up but some great info: I bought the main bed-to-frame mounting bolts and washers from Mar-K in Oklahoma. They are 1/2" x 5.5" long with special Phillips button heads that fit their own tapered washers. I used their instructions and counter-sunk the washers using both a Forstner bit and spade bits to get the taper to fit. The bed wood bolts I used were all stainless 5/16" carriage bolts 1 1/2" long, and I also used stainless 5/16" fender washers with them where required. If you are using stainless hardware you must use antiseize or you will have a bad time...little bolts like 5/16" will gall very easily.