[Vo]:Thermocouple extends beyond steel nut?

[Horace Heffner]

This photo by Mats Lewan of Nyteknik of the 6 Oct Rossi Tout  
thermocouple leaves little doubt in my mind that the Tout  
thermocouple can and probably did extend beyond the steel nut, toward  
the brass manifold. It was thus subject to the air temperature near  
that manifold.

http://www.mtaonline.net/~hheffner/LewanTcoupleClose.jpg
Best regards,

Horace Heffner
http://www.mtaonline.net/~hheffner/