What local hardware store? The few indies that did exist are all gone. Between competition from the big box suppliers and Covid killing in person shopping they died. Hardware, here and now, is an accessory item that people buy when they get their lumber order. Screws, nails, and lag bolts. Shower enclosures and sinks, porcelian thrones and appliances. Home Depot, oddly enough, is the best stocked when it comes to weird stuff but ittty-bitty screws don't much ittier-bittier than 8-32 which is a coarse thread machine screw. You might find 4-40 but that is brass and something the model railroaders mostly look for.
Nick
Nick