Or
Get a digital vernier caliper and measure the OD of the thread and determine pitch with a thread pitch gauge
Or
Get a new jack and nut and swap the old one out assuming you are comfortable with a soldering iron
Or
Bring the cabinet into your local shop and have them match it up if you want it to be original
A DROP of 242 blue Loctite can help keep the nut from backing loose assuming there is no room for an internal tooth lock washer
Get a digital vernier caliper and measure the OD of the thread and determine pitch with a thread pitch gauge
Or
Get a new jack and nut and swap the old one out assuming you are comfortable with a soldering iron
Or
Bring the cabinet into your local shop and have them match it up if you want it to be original
A DROP of 242 blue Loctite can help keep the nut from backing loose assuming there is no room for an internal tooth lock washer