Includes
Test Leads and Test Lead Attachments; Test instruments designed for communication equipment; Test instruments designed for use with electronic equipment classified in two or more FSC groups.

Excludes
Radiac Equipment.

Notes
This class includes all "basic" types of electrical and electronic test instruments, such as ammeters, voltmeters, ohmmeters, multimeters, and similar instruments, even if specially designed. Excluded from this class by the modifier "except specially designed" are test instruments, other than "basic" instruments, which are specially designed for use with atomic ordnance, fire control, guided missile, motor vehicle, aircraft, or photographic equipment. Such specially designed test instruments are to be classified in other classes in the Federal Supply Classification. This class includes communications test equipment, infrared test equipment designed for communication, and night vision maintenance and test specialized equipment.

Possible NAICS Codes
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
334412 – Bare Printed Circuit Board Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
334519 – Other Measuring and Controlling Device Manufacturing
334220 – Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334290 – Other Communications Equipment Manufacturing
314999 – All Other Miscellaneous Textile Product Mills
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

Includes
Liquid Level Float Instruments; Revolution Counters; Speedometers; Rotation Measuring Instruments and Apparatus; Oxygen Flow Indicators; Tachometers, including Engine Tachometers.

Excludes
Combination Instruments; (FSC 6695); Meteorological Instruments (FSC 6660); and Automatic Control Valves (FSG 48).

Possible NAICS Codes
334519 – Other Measuring and Controlling Device Manufacturing
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
333618 – Other Engine Equipment Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
334610 – Manufacturing and Reproducing Magnetic and Optical Media
333120 – Construction Machinery Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
424420 – Packaged Frozen Food Merchant Wholesalers

Includes
Paint Spraying Equipment.

Excludes
Hand Tools (FSG 51).

Possible NAICS Codes
333310 – Commercial and Service Industry Machinery Manufacturing
334419 – Other Electronic Component Manufacturing
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
332510 – Hardware Manufacturing
339999 – All Other Miscellaneous Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
333618 – Other Engine Equipment Manufacturing
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
811210 – Electronic and Precision Equipment Repair and Maintenance

Includes
Maintenance stands designed for support of aircraft assemblies during repair or overhaul; Test Stands and Test Equipment specially designed for maintenance and repair of aircraft components such as: engines, generators, hydraulic systems, armament, automatic pilot, fire control, flight control and navigational systems.

Excludes
Hand Tools; Airfield Maintenance Platforms; Basic types of electrical and electronic test instruments, including those specially designed, such as ammeters, voltmeters, ohmmeters, multimeters, and similar instruments, as shown in the indexes to the FSC; Test Apparatus used for both communications and other electrical and electronic equipment.

Possible NAICS Codes
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332710 – Machine Shops
334419 – Other Electronic Component Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
332721 – Precision Turned Product Manufacturing
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
488190 – Other Support Activities for Air Transportation
336411 – Aircraft Manufacturing
334519 – Other Measuring and Controlling Device Manufacturing

Includes
Automotive Lifts; Wheel Aligners; Brake Service Equipment; Tire Maintenance and Repair Equipment; Test stands and test equipment specially designed for use with motor vehicles.

Excludes
Hand Tools (FSG 51); Lubrication and Fuel Dispensing Equipment (FSC 4930); Basic types of electrical and electronic test instruments, including those specifically designed, such as ammeters, voltmeters, ohmmeters, multimeters, and similar instruments as shown in the indexes in the FSC (FSC 6625).

Possible NAICS Codes
333310 – Commercial and Service Industry Machinery Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
334419 – Other Electronic Component Manufacturing
333618 – Other Engine Equipment Manufacturing
444110 – Home Centers
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
811111 – General Automotive Repair
336992 – Military Armored Vehicle, Tank, and Tank Component Manufacturing
333924 – Industrial Truck, Tractor, Trailer, and Stacker Machinery Manufacturing
332510 – Hardware Manufacturing

Includes
All Engine Instruments, including Aircraft, Marine, and Vehicular; Fuel Pressure Gages; Manifold Pressure Gages; Oil Pressure Gages; Fuel Mixture Indicators; Engine Oil and Fuel Warning Devices.

Notes
Instruments designed for use on both engines and other than engines are not included in this class and should be classified in the appropriate instruments class of group 66.

Possible NAICS Codes
333618 – Other Engine Equipment Manufacturing
334519 – Other Measuring and Controlling Device Manufacturing
336411 – Aircraft Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
335312 – Motor and Generator Manufacturing
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
332510 – Hardware Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

Includes
Specially Designed Test Equipment, Maintenance Fixtures and Stands.

Excludes
Instruments for use on both Fire Control and other Equipment; Airborne Fire Control Maintenance and Repair Shop Equipment.

Possible NAICS Codes
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
922160 – Fire Protection
561621 – Security Systems Services (except Locksmiths)
334419 – Other Electronic Component Manufacturing
561210 – Facilities Support Services
336412 – Aircraft Engine and Engine Parts Manufacturing
332510 – Hardware Manufacturing
238220 – Plumbing, Heating, and Air-Conditioning Contractors
339999 – All Other Miscellaneous Manufacturing
339113 – Surgical Appliance and Supplies Manufacturing

Includes
Thermometers, including Engine Thermometers; Pressure Gages; Thermocouple Leads; Resistance Bulbs.

Excludes
Clinical Thermometers; (FSC 6515); Thermostatic and Differential Pressure Switches (FSC 5930); and Meteorological Instruments (FSC 6660).

Possible NAICS Codes
334519 – Other Measuring and Controlling Device Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
334512 – Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
333618 – Other Engine Equipment Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

Includes
Flow-Pressure Instruments; Taximeters; Dynamometers.

Excludes
Dental, Medical, Surgical, and Veterinary Instruments.

Possible NAICS Codes
334519 – Other Measuring and Controlling Device Manufacturing
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334516 – Analytical Laboratory Instrument Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334419 – Other Electronic Component Manufacturing
333618 – Other Engine Equipment Manufacturing
336411 – Aircraft Manufacturing

Includes
Clocks; Job Recording Devices; Time Recorders; Time Stamps; Watch and Clock Movements; Watches.

Possible NAICS Codes
334519 – Other Measuring and Controlling Device Manufacturing
334419 – Other Electronic Component Manufacturing

Includes
Laboratory Glassware; Laboratory Funnels; Laboratory Furnaces; Glass Beads; Laboratory White Sand; Litmus Paper; Paper Filters; Insect Transfixion Pins; Laboratory Glass Wool; Laboratory Furniture, except Dental Laboratory.

Excludes
Instruments covered by other classes in group 66; Dental Laboratory Equipment; Laboratory Scales and Balances; In Vitro Diagnostic Substances and Reagents.

Possible NAICS Codes
423450 – Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
339999 – All Other Miscellaneous Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing

Includes
Maintenance Stands, Fixtures, and Jigs.

Excludes
Atomic Ordnance Maintenance and Repair Shop Specialized Equipment; Airborne Weapons Maintenance and Repair Shop Equipment.

Possible NAICS Codes
334419 – Other Electronic Component Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
334514 – Totalizing Fluid Meter and Counting Device Manufacturing
332722 – Bolt, Nut, Screw, Rivet, and Washer Manufacturing
336411 – Aircraft Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing

Includes
Attachments for Tanks, Self-propelled Weapons, and High Speed Tractors; A-frames and Winches specifically designed for truck mounting; Cranes and Crane Booms for Wrecker Trucks.

Possible NAICS Codes
336992 – Military Armored Vehicle, Tank, and Tank Component Manufacturing
333310 – Commercial and Service Industry Machinery Manufacturing
336390 – Other Motor Vehicle Parts Manufacturing
332510 – Hardware Manufacturing
333618 – Other Engine Equipment Manufacturing
336320 – Motor Vehicle Electrical and Electronic Equipment Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
313210 – Broadwoven Fabric Mills
333120 – Construction Machinery Manufacturing
336999 – All Other Transportation Equipment Manufacturing

Includes
Permanent Magnets and Magnetostriction Elements; Caps, Clips, and Contacts, Electrical.

Possible NAICS Codes
334419 – Other Electronic Component Manufacturing
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing
334416 – Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing
335931 – Current-Carrying Wiring Device Manufacturing
334413 – Semiconductor and Related Device Manufacturing
339991 – Gasket, Packing, and Sealing Device Manufacturing
336411 – Aircraft Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
541519 – Other Computer Related Services
334417 – Electronic Connector Manufacturing

Includes
Binoculars; Magnifiers; Microscopes; Periscopes; Telescopes. Optical Elements, such as Lens, Prisms, Windows; Optical Benches and associated devices; Endoscopes, Fiber Optics (non-medical).

Excludes
Fire Control Instruments, Optical; Surveying Instruments, Optical; Photogrammetric Instruments; Octants and Sextants; Optical Instruments Integrated with Fire Control Equipment; Ophthalmological Instruments; Electronic Fiber Optic Test Equipment; Medical Endoscopes.

Possible NAICS Codes
333310 – Commercial and Service Industry Machinery Manufacturing
334516 – Analytical Laboratory Instrument Manufacturing
424420 – Packaged Frozen Food Merchant Wholesalers
334519 – Other Measuring and Controlling Device Manufacturing
334515 – Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
334513 – Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
334419 – Other Electronic Component Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
339115 – Ophthalmic Goods Manufacturing