BS EN 2894:2018 Aerospace series. Nuts, bihexagonal, self-locking, with counterbore, in heat resisting nickel base alloy, passivated, MoS2 lubricated. Classification: 1 550 MPa (at ambient temperature) / 315 $0DC

Corrosion tests
Qualification approval
Quality assurance systems
Elastic constants
Mixing
Air transport engineering
Density
Compression set
Tear tests
Approval testing
Aerospace transport
Nickel alloys
Synthetic rubber
Tensile strength
Natural rubber
Properties
Elongation
Nuts
Hardness testing
Thermal resistance
Nickel
Quality assurance

Link: BS EN 2894:2018 Aerospace series. Nuts, bihexagonal, self-locking, with counterbore, in heat resisting nickel base alloy, passivated, MoS2 lubricated. Classification: 1 550 MPa (at ambient temperature) / 315 {$permalink}DC
Source: BSI Standards