GDK1939 Gauging Drill Kit #19–39 (Standard Box) 

Special Order Item 7 to 10 Day lead time

The Gauging Drill Kit #19–39 (Standard Box) is the industry‑standard HVAC orifice‑gauging set used for precise burner orifice sizing in natural gas and LP applications. This kit includes drill sizes #19 through #39, covering the most common orifice ranges used in residential, mobile‑home, and light‑commercial heating equipment.

Manufactured by Anderson & Forrester, the OEM leader in orifice tooling, the kit features precision‑ground bits stored in a durable standard box for technician use in the field. Ideal for adjusting manifold pressure, tuning combustion, and verifying correct BTU output.

Included Sizes

• #19 through #39 (27 total drills)

• Precision‑ground for accurate orifice measurement

• Standard HVAC orifice range for NG/LP burners

Applications

• Furnace burner orifice sizing

• Mobile‑home furnace tuning

• RV furnace orifice adjustments

• Water heater orifice checks

• Any NG/LP combustion system requiring precise orifice measurement

Cross‑Reference Part Numbers

Based on grounded product data:

• GDK1939 (Anderson & Forrester)

• 721018