MIL-STD-196 Joint Electronics Type Designation SystemThe purpose of this standard is to provide the policies, requirements and procedures for the preparation and submission of Requests for Nomenclature RFN under the JETDAS.

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MIL-STD-196F

b. Commercial electronic material that has been modified for military use and requires military identification and design control;

c. Electronic materiel which is intended for use by other Federal agencies or foreign governments that participate in the nomenclature system.

4.2.2 Restrictions on assignment. Nomenclature shall not be assigned to the following:

a. Materiel below unit item level;

b. Commercial unmodified electronic materiel for which the manufacturer maintains design control;

c. Electronic materiel previously assigned nomenclature under another nomenclature system;

d. Commercial electronic materiel for the convenience of a foreign country which does not participate in the nomenclature system;

e. Computer software systems;

f. Non-electronic items.

g. Equipment without a government contract number, government order number, government drawing or government specification number.

4.2.3 Basis for assignment. Each type designator assignment or revision to the type designator previously assigned is made on the basis of technical data which contains sufficient electrical, mechanical, functional, and reference data to distinguish the item described from all other items. The originator of a request for nomenclature shall provide all technical characteristics required for a complete understanding of the operating parameters of the item being submitted for nomenclature. The type designator portion of a nomenclature shall be determined by the technical characteristics of the item.

4.2.4 Revision of approved nomenclature. When the technical data for an item previously submitted is no longer correct, the originator should submit a request for a revision, containing the data that accurately reflects the item being procured. In addition, the revised request shall include a statement in Block 24 of the DD Form 61 that no items were produced and delivered to the Government as described under the basic or preceding request. If otherwise, the request shall indicate the differences in the models and specify the degree of interchangeability or substitutability of each model.

4.2.5 Modification of Approved Nomenclature. In order for a modification letter to be assigned, the modified item must be at least one way interchangeable, electrically, mechanically, and functionally with the basic type designator item and all previous models. If the modified item is only similar to the basic, a new type designator will be assigned.