I am using carriage bolts to build a replacement play set for my kids. The
old play set (which came with the house) has a number of specialized "washers"
which go along with the carriage bolts. The washer has two unique features:
1) instead of a round hole, the hole is square and sized to mate perfectly
with the square portion of the carriage bolt shaft.
2) the washer has a couple of spurs (like a tee nut) which prevent it from
turning once the washer is drawn tight to the surface of the wood.
I think these washers are nifty, and I need more of them for this project.
I've tried Ace, Sears, HD, Lowe's, Menard's, and a couple of local builder's
stores with no success. In fact, the workers there have never seen one of