Aerospace -- Nuts, hexagonal, slotted (castellated), for pulleys, in alloy steel and cadmium plated or in corrosion-resistant steel and passivated -- Dimensions and masses
This International Standard specifies the characteristics of hexagonal, slotted/castellated nuts, of reduced height and reduced width across flats — in alloy steel and cadmium-plated, classification 900 МРа/235 °C; or — in corrosion-resistant steel and passivated, classification 900 MPa/450 °C. This International Standard is applicable to nuts used with ISO 9219 bolts, ISO 9217 and ISO 9218 washers and ISO 1234 split pins in the assembly of ISO 7939 pulleys. It is also applicable to nuts used in the assembly of airframe rolling bearings or spherical bearings.