On Stainless Steel-Slotted locknuts DIN 1804 the ground surface d3 stands proud and should be used as a mating surface.The sizes M45x1,5 to M60x1,5 have 6 slots.
On slotted locknuts DIN 1804 the ground surface d3 stands proud and should be used as a mating surface.Sizes M45x1,5 to M60x1,5 have 6 slots.The official DIN standard sheet specifies additional sizes (up to M 200x3).