You will get the brand new brass thumb screw with the spring pictured for your PWK carbs, all sizes. This is Brand new made byKeihin / Check out our ebay store for more carb parts. Measures 0.75 TPI x 5.85 OD / The threads are obviously metric, I don’t know a lot about metric since the stuff I work on is all SAE, CEI or Whitworth, but the pitch of these threads are 0.75 TPI and the OD of the threads are 5.85. The diameter of the stem is 3 mm the length of the stem after the threads are 25 mm. You can measure the screw coming out of your carb to determine if this will work for you on your Keihin PWK or the aftermarket PWK.