Rationale: The development and publication of this standard is at the request of U.S. military end users to define this existing component so that it can be employed on various air and land platforms. It has the concurrence of two or more manufacturers. No item or feature has a claim in any active U.S. Patent. The standard defines the: configuration, dimensions, materials, interface, performance and qualification requirements. This ensures acquisition requirements for component standardization and
employment of standard / qualified parts (SAE AS50881 F, para 3.3).