Product details at JLR Classic
M8 Nylok flanged nut. Documented for automatic gear-change assemblies with ZF 6HP26 Steptronic in Discovery 3, Range Rover L322 and Range Rover Sport 2005-2009, through VIN 9A999999. Also listed for non-armoured L322 M62 4.4 petrol and M57 3.0 diesel exhaust systems. Check the exact assembly; not universal across all engines or transmissions.