These standards from ISO and SAE cover self-locking nut requirements. This list covers self locking hex and spline nuts standards.
This International Standard specifies the dimensions of bihexagonal nuts with counterbore and MJ threads and a self-locking feature achieved by forming the upper portion out-of-round, for classifications: 1 100 MPa 1) /425 C 2) , 1 100 MPa 1) /650 C 2) , 1 210 MPa 1) /425 C 2) , 1 210 MPa 1) /730 C 2) , 1 550 MPa 1) /235 C 2) , 1 550 MPa 1) /425 C 2) and 1 550 MPa 1) /600 C 2) . This International Standard is only applicable for the compilation of aerospace product standards. 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the material or by the surface treatment.
This International Standard specifies the dimensions of self-locking hexagonal nuts, with counterbore and captive washer, with MJ threads, of classifications: 1 100 MPa 1) /235 C 2) , 1 100 MPa 1) /315 C2) , 1 100 MPa 1) /425 C 2) . This International Standard is only applicable for the compilation of aerospace product standards.
ISO 9157:2002 specifies the dimensions of spline-drive nuts, with MJ threads and a self-locking feature achieved by forming the upper portion out-of-round, for classifications: 1 100 MPa/425 C, 1 100 MPa/650 C, 1 210 MPa/425 C, 1 210 MPa/730 C, 1 550 MPa/235 C, 1 550 MPa/ 425 C and 1 550 MPa/600 C. ISO 9157:2002 is only applicable for the compilation of aerospace product standards.
This International Standard specifies the dimensions of bihexagonal nuts with counterbore and MJ threads and a self-locking feature achieved by forming the upper portion out-of-round, for classifications: 1100 MPa 1) /425 C 2) , 1100 MPa 1) /650 C 2) , 1210 MPa 1) /425 C 2) , 1210 MPa 1) /730 C 2) , 1550 MPa 1) /235 C 2) , 1550 MPa 1) /425 C 2) and 1550 MPa 1) /600 C 2) . This International Standard is only applicable for the compilation of aerospace product standards. 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the material or by the surface treatment.