scope:

These British Standards specify materials, dimensions, protective treatment, identification and marking, togethe; with part numbers for hexagon (thick) self-locking nuts, with non-metallic inserts and having IS0 MJ screw threads.

They are primarily intended for use on non-structural aerospace applications and have operational temperature limitations of -40 O C to +120 ºC.

For an interim period, coarse thread pitch series for size codes 080, 100 and 120 have been included in appendix A for those users wishing to specify them.