HB7595—2011 General specification for nuts, self-locking, with maximum operating temperature less than or equal to 425 ℃
1)Industry standard of aviation
After installing nut on bolt, screwing up and back out for 15 times. Not giving locking moment to aluminium alloy, copper nut, and specification is less than or equal to 4mm.
2)Testing method for capacity of self-locking nut:
Twistting off testing for nut carried out by GJB715.5-1990
Pushing off testing for nut carried out by GJB715.4-1990
Vibrating testing for nut carried out by GJB715.3A-2003
GJB3.1A-2003, universal requirement for MJ screw threat
GJB3.2A-2003, ultimate limited specification of bolt and screw threat for MJ screw threat
HB8026-2002, TC16 hexagon, self-locking thick nuts in titanium alloy
HB8027-2002, TC16 hexagon, self-locking thin nuts in titanium alloy
Flaring testing for grasping nut: flaring by 60°taper, flaring to 1.2 times.
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