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. 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 Tri Clamp Gaskets - 100% Silicone from $1.69 Copper Ferrules - Tri Clamp from $21.99 Beer Keg Gasket - 2 inch Tri Clamp Flat $4.99 Stainless Steel caps - tri clamp from $7.99 Digital Thermometer Gasket $2.49