Honeywell 1789 , Inc. PLASTIC ADJUSTMENT KNOB FOR T921. ONE UNIT.

KNOB FOR T921

The Honeywell Plastic Knob for T921 Thermostat is a retrofit replacement for the old plastic knob on the T921 series. It is designed to be installed onto existing T921 thermostats.

Used with Knob, T921, Plastic, # 1789-8.

The 1789 plastic adjustment knob for T921 is clear with white raised letters. It is approximately 22mm in diameter.

Honeywell 1789, Adjustment knob for T921. Plastic knob with spindle for manual control of flow.

The T921A, 900/921 B mounting plate assembly is comprised of the plastic back plate with two tapped holes and two mounting screws (one partially installed), an adjustment knob, a threaded stud assembly with washer, and an allen head set screw to secure the knob to the stud.

The plastic adjustment knob has an inside diameter of 3/4 inch. It is approximately 3 inches long and 1-1/4 inches wide. The new Honeywell 98621000 knob is being designed as a replacement to the knob found on the previous model ( T921 ). This is a direct replacement and there is no change in the dimensions or functionality of the T921.

HONEYWELL'S MODEL 1789 DOUBLE POINT FILL VALVES AND MODEL T921 HANDLE ALLOWS CHANGE OF IDEAL HARDNESS, RESISTANCE, COMFORT, AND DURABILITY TO THE FIT OF THE GLOVES. IT CAN BE USED IN MANY TYPES OF INDUSTRIAL APPLICATIONS.