Product Description：

Name: Hexagon Head Bolt
Material: Pure Copper
Standard: Metric
Size: Thread Diameter x Length(Excluding Head)
e.g.: M5x12mm (Thread Diameter 5mm, Length 12mm)
Thread Diameter: M5 (5mm) / M6 (6mm) / M8 (8mm) / M10 (10mm) / M12 (12mm)
Length: 12mm / 16mm / 20mm / 25mm / 30mm / 35mm / 40mm / 45mm /
50mm/60mm/70mm/80mm/100mm(Excluding head)
Pitch: 
M5 - Thread pitch 0.8mm
M6 - Thread pitch 1mm
M8 - Thread pitch 1.25mm
M10 - Thread pitch 1.5mm
M12 - Thread pitch 1.75mm