**TL;DR:** What is the most cost-effective, high-shear-strength fastener available at big-box stores to laminate two layers of 3/4" reclaimed oak floorboards *without* using glue?
I moved and need a new workbench (primarily hand tools). My grandpa passed recently, and I inherited his stash of reclaimed, tongue-and-groove, white oak flooring. It seems right to use some of that oak and design this build like he would have. Grandpa was frugal, but not cheap. That means a design as cheap as possible to still get the job done properly. He would have used--and did use--construction lumber, fasteners he had on hand, and mostly butt joints for his bench.
Hence, the bench you see mostly finished here. Could I have built this bench more beautifully? Yes. Could I have used more detailed joinery? Yes. Would Grandpa have done that? Nope. That would be unnecessary work with modern fasteners.
I'm having trouble writing this without getting long-winded, so bullet points:
* I'm making diagonal leg bracing out of the oak floorboards, but they're too thin for reliable joinery as a single layer--about 3/4". * The sides will be braced leg-to-leg * The back will be braced leg-to-apron * The boards must stay unprocessed to keep the original patina/staining from my grandpa's shop for sentimental reasons. Adhesive won't bond well as they are. * Without adhesive, the oak will need to be laminated via fasteners. * Those fasteners will need to be strong against shear forces. * Cost is not a driving concern. So far, this bench has cost me a total of $60 in construction lumber. However, I want to stay true to the design constraint: Grandpa would have done this as cheaply as possible to get the job done properly.
What is the cheapest fastener I can get at a local big box store that will meet my needs? #diy source