Hex Flange Prevailing Torque Zinc Plated Steel all-metal lock nut. These are DIN 6927 and have a Class 8 rating and RoHS CR+3 Zinc and have a standard coarse thread.

Available Sizes :

M5 / 5mm x 0.80, M6 / 6mm x 1.0, M8 / 8mm x 1.25,

M10 / 10mm x 1.50, M12 / 12mm x 1.75