In industrial and design cataloging, these numbers often represent precise technical specifications or dimensions:

: This value is commonly found in mechanical engineering as a gear ratio . In off-road and performance vehicles, a 5.29 ratio is a specific aftermarket gear set used to compensate for larger tires or to increase torque.

: Frequently used to denote a series or model number. For example, in the automotive world, "36" is famously associated with the BMW E36 chassis, which uses various performance "sets" for suspension and mechanical upgrades.