Buy from Amazon.com : http://best.waitmejapan.com/?asin=B00835NT5W
Dixon B23BMPG200 Stainless Steel 304 Sanitary Fitting Thermometer Cap 2 Tube OD x 34 NPT
Product Description :
Cap for closing the end of a pipe or tube with a female NPT opening for a thermometer not included
Clamp end connection for a non-permanent seal providing access to lines
Stainless steel 304 for resistance to corrosion and high temperatures
Maximum operating pressure rating of 250 psi at 70 degrees F ambient temperature