This standard BS EN 2647:2006 Aerospace series. Nuts, hexagonal, self-locking, ball seat, in alloy steel, cadmium plated, MoS2 lubricated. Classification: 900 MPa (at ambient temperature) / 235°C is classified in these ICS categories:
49.030.30 Nuts
This standard specifies the characteristics of self-locking hexagonal nuts with ball seat in alloy steel, cadmium plated, MoS2 lubricated. Classification: 900 MPa ) / 235 °C ) They are intended to be used with washers to EN 2648 or suitable parts, see Annex A.