| Code | Definition |
| $ | Identifies Nuclear Weapons Use Control (UC) Ground Equipment which is CIIC
unclassified but may require special controls. Use Control Ground Equipment is described as recoders, verifiers, adapters, power supplies, cables, programmers, |
| 1 | Highest Sensitivity (Category I) - Nonnuclear missiles and rockets in a ready-to-fire configuration (for example, Hamlet, Redeye, Stinger, Dragon, LAW, and Viper) and explosive rounds for nonnuclear missiles and rockets. |
| 2 | High Sensitivity (Category II) - Arms, ammunition, and explosives. |
| 3 | Moderate Sensitivity (Category III) - Arms, ammunition, and explosives. |
| 4 | Low Sensitivity (Category IV) - Arms, ammunition, and explosives. |
| 5 | Highest Sensitivity (Category I) - Arms, ammunition, and explosives with a physical security classification of Secret. |
| 6 | Highest Sensitivity (Category I) - Arms, ammunition, and explosives with a physical security classification of Confidential. |
| 7 | Item displays Sensitive Information.Prior to disposal,all name plates,label plates,meter face plates,tags stickers,documents or markings that relate items to weapons system/end-item application must be removed and destroyed. |
| 8 | High Sensitivity (Category II) - Arms, ammunition, and explosives with a physical
security classification of Confidential. |
| 9 | This code identifies an item as a Controlled Cryptographic Item (CCI). CCI is described as secure telecommunications or information handling equipment, associated cryptographic component, or other hardware item which performs a critical COMSEC function. |
| A | Confidential - Formerly Restricted Data |
| B | Confidential - Restricted Data |
| C | Confidential |
| D | Confidential - Cryptologic |
| E | Secret - Cryptologic |
| F | Top Secret - Cryptologic |
| G | Secret - Formerly Restricted Data |
| H | Secret - Restricted Data |
| I | Aircraft engine equipment and parts |
| J | Pilferage - Pilferage controls may be designated by the coding activity to items coded U (Unclassified) by recording the item to J. |
| K | Top Secret - Formerly Restricted Data |
| L | Top Secret - Restricted Data |
| M | Handtools and shop equipment |
| N | Firearms |
| O | Item contains naval nuclear propulsion information; disposal and access limitations are identified in NAVSEAINST C5511.32.Store and handle so as to preclude unauthorized access to this material. |
| P | Ammunition and explosives |
| Q | An item that is a drug or other substance determined by the Administrator, Drug
Enforcement Administration, Department of Justice, to be designated Schedule Symbol III,IV, and V as defined in the Controlled Substance Act of 1970. Other items requiring secure storage |
| R | Precious Metals, a drug or other controlled substance designated as a Schedule I or II item, in accordance with the Controlled Substance Act of 1970. Other selected sensitive items requiring storage in a vault or safe. |
| S | Secret |
| T | Top Secret |
| U | Unclassified |
| V | Individual clothing and equipment |
| W | Office machines |
| X | Photographic equipment and supplies |
| Y | Communication/electronic equipment and parts |
| Z | Vehicular equipment and parts |