Those are available in hardware stores here, but somewhat limited. Mopar used a lot of different hardware. Including diff size/types of washers. some were solid to the fastener. Others are what they call a captive washer that is loose as far as turning, but cant be removed. there are also flange bolts where the head is a little wider, but not really a washer. I don't care if every bolt on mine is OEM, but a lot of times standard bolt don't quite do the same job.