M5
Thread diameter; 5mm
Thread pitch; 0.8mm
Allen key size; 3mm
Head diameter; 11mm
M6
Thread diameter; 6mm
Thread pitch; 1mm
Allen key size; 4mm
Head diameter; 13mm
M8
Thread diameter; 8mm
Thread pitch; 1.25mm
Allen key size; 5mm
Head diameter; 16mm
M10
Thread diameter; 10mm
Thread pitch; 1.5mm
Allen key size; 6mm
Head diameter; 20mm