Shop › 1/2" NPT x 1/2" copper fitting - Thermometer adapter Image 1 of 1 1/2" NPT x 1/2" copper fitting - Thermometer adapter $5.99 Solder this part to your still to use a 1/2" NPT thermometer.Installs with a 5/8" drill bit. Quantity: Add To Cart Added! Solder this part to your still to use a 1/2" NPT thermometer.Installs with a 5/8" drill bit. Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More You Might Also Like Screened Tri clamp Gaskets - 100% Silicone #10 Stainless Steel Mesh from $17.99 Beer Keg Gasket - 2 inch Tri Clamp Flat $4.99 1.5 inch x 0.5 inch Tri Clamp to FPT - Stainless Steel $13.99 Digital Thermometer Gasket $2.49 Dial Thermometer - Bottom Entry $39.99