I found a good, reliable source for metric fasteners (they also sell US fasteners):
Bolt Depot
286 Bridge St. (Rt 3A)
North Weymouth, MA 02191
They sell a complete line of metric fasteners in both stainless steel, grade 18-8 and regular steel, grade 8.8. Available are hex bolts, nuts (regular, self-locking, wing and cap), washers and machine screws. Prices are very good and all parts are available by the individual piece or full box so you don't have to buy more than you need. I ordered from them and delivery was prompt and hassle free. Great service.
Bolt Depot
286 Bridge St. (Rt 3A)
North Weymouth, MA 02191
They sell a complete line of metric fasteners in both stainless steel, grade 18-8 and regular steel, grade 8.8. Available are hex bolts, nuts (regular, self-locking, wing and cap), washers and machine screws. Prices are very good and all parts are available by the individual piece or full box so you don't have to buy more than you need. I ordered from them and delivery was prompt and hassle free. Great service.