| RNVC | Descriptions |
| 1 | A design control reference or other reference number that does not identify an item of production without the use of additional information, or is either a specification, part, type or similar reference number that does not identify an item of supply without the use of additional information. |
| 2 | A design control reference or other reference number that is an item-identifying number for an item of production, or is either a source control reference, a specification or a standard part, type, or similar reference number that is an item-identifying number for an item of supply. |
| 3 | A vendor's reference (part) number on a source control item, as defined in ASMEY-14.24M and ASMEY-14.100M, which is reparable through the removal, exchange, and reinstallation of component parts. The related source control document number will also reflect Code 3. This code is limited to a type 1B or 4B item identification. |
| 8 | A non-item-identifying reference number that is added to a replacement NSN as a result of a cancel-use action on a NSN recorded with ISC 3 or E. It is used to identify the original item of supply/replaced item. This reference number is automatically moved and this code is automatically assigned, do not submit for cataloging purposes. |
| 9 | A reference number which was the Design Control Reference for the item of supply concept (Original Design Activity) that is now inactive coded Reference Number Category Code (RNCC) 3; a specification, standard, or other reference number which is superseded, cancelled, obsolete or discontinued and is coded RNCC 5; a reference number for information only coded RNCC 6; a drawing which is the Single Controlling Reference Number (SCRN) coded RNCC 2 or 7; or a drawing number reference coded RNCC D. |