This standard BS EN 4084:2009 Aerospace series. Nuts, anchor, self-locking, fixed, two lug, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated. Classification: 1100 MPa (at ambient temperature) / 235°C is classified in these ICS categories:
49.030.30 Nuts
This European Standard specifies the characteristics of two lug fixed anchor nuts, with counterbore and a self-locking feature achieved by forming the upper portion out-of-round, in alloy steel, cadmium plated, MoS2 lubricated. Classification: 1 100 MPa / 235 °C.