This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Air Speed Indicators; Rate of Climb Indicators; Bank and Turn-Indicators; Pilot Tubes, Gyro Horizon Indicators; Attitude Gyro Indicators.
Navigational Instruments (FSC 6605).
Possible NAICS Codes
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334519 – Other Measuring and Controlling Device Manufacturing
488190 – Other Support Activities for Air Transportation
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing