The spare part GB/T6170-M6 is available for purchase and is in stock
Delivery time is normally about one week
2 pieces "nut, hexagon m6 GB/T6170-M6" are being used on the page "F20/F25 upper casing" They are sold one by one, if you need a complete set you need to buy multiple.
This nut, hexagon m6 is used for all these parsun models