Helicoil repair for damaged threads on Steam tank High Limit. 

11/64 Stainless Steel Drill Bit

Metal cutting Lube

Drill

Center punch

Link to where we sourced the product. 

Use center punch to create a divot in the sheered off stem inside the tank.

Gauge the depth needed to drill by marking off with tape on the drill bit.

Using the drill bit, slowly drill out the hole.

Use the Helicoil kit instructions to clean, re-thread, and insert the Helicoil

Add a small application of thermal paste to the base and threads of the High Limit Thermostat.

Install finger tight.