M8 X 1MM FINE PITCH NYLOC NUTS NYLON INSERT LOCK NUT ZINC PLATED STEEL BZP
Zinc Plated BZP. These are a DIN 985. Further details are as follows 'T Type' Nyloc Nut Across the Flats (A/F) - 13mm. 'T Type' Nyloc Nut Height - 8mm. P Type Nyloc Nuts. T Type Nyloc Nuts. Nyloc Nuts.