M10x(1.25mm) drilled aluminium sprocket nut. Made from high-strength aerospace aluminium, anodised for extra protection and then fitted with a steel helical insert for even greater strength. Material: aluminium. Product type: nut. Thread diameter: 10mm. Thread pitch: 1.25mm. Flange diameter: 20mm. Socket size: 16mm. Product weight: 4.85g. Quantity per pack: 1. Height: 10mm.