This specification covers flexible and rigid push-pull controls used for activating remotely located equipment such as flight controls, system components, and engine throttles.

Push-pull controls will be of the types and grades as specified (see 6.2).

The types of push-pull controls are as follows:

Type I - Push-pull controls with flexible tubular casing containing a moveable element

Type II - Push-pull controls with rigid tubular casing containing a moveable element

Type III - Push-pull controls with a combination of rigid and flexible tubular casing containing a moveable element

The grades of push-pull controls are as follows:

Grade A - Push-pull controls made of specially selected components that are individually tested by the contractor to insure that the backlash and operating forces are reduced to the minimum values practical

Grade B - Push-pull controls made to commercial standards for applications not requiring Grade A controls