Flat end ISO 4766

Size
M3x5M3x6M3x8M3x10M4x5M4x6M4x8M4x10
M4x12M4x16M5x5M5x6M5x8M5x10M5x12M5x14
M5x16M5x18M5x20M6x6M6x8M6x10M6x12M6x14
M6x16M6x18M6x20M6x25M8x10M8x12M8x14M8x16
M8x20M8x25M10x16M10x18M10x22M12x25  

Tapered end ISO 7434

Size
M4x6M4x8M4x10M5x6M5x8M5x10M5x12M5x14
M5x16M5x18M5x20M5x25M5x30M6x6M6x8M6x10
M6x12M6x14M6x16M6x18M6x20M6x25M8x10M8x12
M8x14M8x16M8x20M8x25M8x30M12x16M12x20M12x25