Aerospace – bihexagonal head bolts, close tolerance, with medium-length MJ thread, corrosion resisting nickel alloy – nominal tensile strength 1 550 MPa, for temperatures up to 315 °C; Inactive for new design
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2016

Aerospace; bihexagonal head bolts, close tolerance, with medium-length MJ thread, corrosion resisting nickel alloy; nominal tensile strength 1550 MPa, for temperatures up to 315 °C
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/1993