48 CFR 811.001 - Definitions.
For the purposes of this part:
Brand name product means a commercial product described by brand name and make or model number or other appropriate nomenclature by which the product is offered for sale to the public by the particular manufacturer, producer or distributor.
Salient characteristics means those particular characteristics that specifically describe the essential physical and functional features of the material or service required. They are features that are identified in the specifications as a mandatory requirement that a proposed “equal” product or material must possess for the bid to be considered responsive.