Bonnet and stuffing box assembly

A bonnet and stuffing box assembly comprising:

• a bonnet, the bonnet defining a bonnet bore;
• a stuffing box connected to the bonnet, the stuffing box defining a stuffing box bore, the stuffing box bore and bonnet bore defining an assembly bore;
• a bushing assembly received in the assembly bore and comprising a stuffing box bushing and a bonnet bushing, the bushing assembly defining a bushing bore extending through the stuffing box bushing and the bonnet bushing;
• and
• a stem extending through the bushing bore;
• wherein:
• the stuffing box bushing defines a first bushing end and a second bushing end opposite the first bushing end;
• the bonnet bushing defines a first bushing end and a second bushing end opposite the first bushing end;
• and
• the second bushing end of the stuffing box bushing extends through the second bushing end of the bonnet bushing and into bonnet bushing bore of the bonnet bushing.