Aerospace series. Bolts with double hexagon head, relieved shank, long thread, in heat resisting steel FE-PM 38 (FV 535). Classification: 1000 MPa/550 °C subscription-only It deals with safety requirements

It deals with safety requirements for storage and the high pressure piping system from storage to the gas control unit or pressure regulator equipment

1:1983 and BS 5400-9

an automation environment

BS EN 4127 is a European standard on hexagonal head bolts that discusses the criteria for the workability of the bolt

Contents of BS EN 15838 include:

Aerospace series. Bolts with double hexagon head, relieved shank, long thread, in heat resisting steel FE-PM 38 (FV 535). Classification: 1000 MPa/550 °C subscription-only It deals with safety requirements1 Scope This standard specifies the characteristics of double hexagon head bolts with relieved shank and long thread in heat resisting steel FM PM 38, tensile strength class 1 000 MPa at room temperature. The maximum test temperature of the material is 550 C. These bolts are to be used in aerospace fastening systems, of parts made in titanium, mainly stressed in tension.