Therm Products 2-1/2" Uni-Nut® for 3" housings
86-02370 also includes the retaining ring.
3 Inch Heater Uni-nut. Actual inner diameter Is 3 1/4 inch and the outer diameter measures 4 inches. Includes Retainer.
86-02370
Therm Products 2 1/2 Inches Uni-Nut for 3 Inch Housing 86-02370