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ISO 8641:2008
Aerospace - Self-locking nuts with maximum operating temperature greater than 425 degrees C - Procurement specification
ISO 8641:2008 specifies the required characteristics for metric self-locking nuts, with MJ thread, for use in aerospace construction at a maximum temperature greater than 425 °C.
ISO 8641:2008 is applicable to nuts as defined above, provided that reference is made to this International Standard in the relevant definition document.
International Organization for Standardization [iso]