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

3)Relative standard:

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