This standard specifies the characteristics for self-locking bihexagonal nuts in NI-P101HT, silver plated on thread, for aerospace applications.
AECMA PREN 3310-1988 history
1995AECMA PREN 3310-1995 Aerospace Series Titanium Alloy TI-P64001 not Heat Treated Grade 2 Forging Stock, for Annealed Forgings a or D Less Than or Equal to 360 mm Edition P 2
1988AECMA PREN 3310-1988 Titanium Alloy TI-P63 Not Heat Treated Reference Heat Treatment: Annealed Grade 2 Forging Stock De Less Than or Equal to 360 mm