O Departmento de Obtenção da CNBW promove a compra de material e de sobressalente para a Marinha do Brasil dentro de sua área de jurisdição.
Na tabela a seguir, pode-se observar as classes de material mais obtidas pela CNBW nos anos de 2018 e 2019:
| Classe | Descrição | Total |
|---|---|---|
| Sem classe | - | 528 |
| 5330 | Packing and Gasket Materials | 36 |
| 6210 | Indoor and Outdoor Electric Lighting Fixtures | 18 |
| 4610 | Water Purification Equipment | 17 |
| 4820 | Valves, Nonpowered | 14 |
| 4320 | Power and Hand Pumps | 10 |
| 3110 | Ball Bearings, AntiFriction, Unmounted | 7 |
| 4720 | Hose and Flexible Tubing | 7 |
| 5331 | O-Ring | 7 |
| 5340 | Hardware, Commercial | 7 |
| 5365 | Bushings, Rings, Shims, and Spacers | 7 |
| 8415 | Clothing, Special Purpose | 7 |
| 4810 | Valves, Powered | 5 |
| 5305 | Screws | 5 |
| 5310 | Nuts and Washers | 5 |
| 5315 | Nails, Machine Keys, and Pins | 5 |
| 5925 | Circuit Breakers | 5 |
| 5965 | Headsets, Handsets, Microphones and Speakers | 5 |
| 5999 | Miscellaneous Electrical and Electronic Components | 5 |
| 3040 | Miscellaneous Power Transmission Equipment | 4 |
| 3130 | Bearings, Mounted | 4 |
| 5306 | Bolts | 4 |
| 6605 | Navigational Instruments | 4 |
| 6850 | Miscellaneous Chemical Specialties | 4 |
| 3010 | Torque Converters and Speed Changers | 3 |
| 4310 | Compressors and Vacuum Pumps | 3 |
| 4330 | Centrifugals, Separators, and Pressure and Vacuum Filters | 3 |
| 5325 | Fastening Devices | 3 |
| 5360 | Coil, Flat, Leaf, and Wire Springs | 3 |
| 5895 | Miscellaneous Communication Equipment | 3 |
| 5945 | Relays and Solenoids | 3 |
| 6110 | Electrical Control Equipment | 3 |
| 6130 | Converters, Electrical, Nonrotating | 3 |
| 6140 | Batteries, Rechargeable | 3 |
| 6645 | Time Measuring Instruments | 3 |
| 6650 | Optical Instruments, Test Equipment, Components and Accessories | 3 |
| 6655 | Geophysical Instruments | 3 |
| 6680 | Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments | 3 |
| 1560 | Airframe Structural Components | 2 |
| 2950 | Turbo Supercharger and Components | 2 |
| 3120 | Bearings, Plain, Unmounted | 2 |
| 5963 | Electronic Modules | 2 |
| 5998 | Electrical and Electronic assemblies, Boards, Cards, and Associated Hardware | 2 |
| 6135 | Batteries, Nonrechargeable | 2 |
| 6230 | Electric Portable and Hand Lighting Equipment | 2 |
| 6685 | Pressure, Temperature, and Humidity Measuring and Controlling Instruments | 2 |
| 1005 | Weapons (from 1 mm through 30 mm). | 1 |
| 1240 | Optical Sighting and Ranging Equipment | 1 |
| 1377 | Cartridge and Propellant Actuated Devices and Components | 1 |
| 1630 | Aircraft Wheel and Brake Systems | 1 |
| 1650 | Aircraft Hydraulic, Vacuum, and Deicing System Components | 1 |
| 1660 | Aircraft Air Conditioning, Heating, and Pressurizing Equipment | 1 |
| 2010 | Ship and Boat Propulsion Components | 1 |
| 2040 | Marine Hardware and Hull Items | 1 |
| 2620 | Tires and Tubes, Pneumatic, Aircraft | 1 |
| 2815 | Diesel Engines and Components | 1 |
| 2910 | Engine Fuel System Components, Nonaircraft | 1 |
| 3020 | Gears, Pulleys, Sprockets, and Transmission Chain | 1 |
| 4520 | Space and Water Heating Equipment | 1 |
| 4730 | Hose, Pipe, Tube, Lubrication, and Railing Fittings | 1 |
| 5307 | Studs | 1 |
| 5320 | Rivets | 1 |
| 5930 | Switches | 1 |
| 5935 | Connectors, Electrical | 1 |
| 5985 | Antennas, Waveguides, and Related Equipment | 1 |
| 5995 | Cable, Cord, and Wire Assemblies Communication Equipment | 1 |
| 6020 | Fiber Optic Cable Assemblies and Harnesses | 1 |
| 6120 | Transformers Distribution and Power Station | 1 |
| 6660 | Meteorological Instruments and Apparatus | 1 |
| 7030 | ADP Software | 1 |
| 8315 | Notions and Apparel Findings | 1 |
| 9150 | Oils and Greases Cutting, Lubricating, and Hydraulic | 1 |