This SAE Aerospace Standard (AS) provides requirements for components that are used in commercial aircraft hydraulic systems. It is to be used in conjunction with a Procurement Specification for each component. This specification shall be used to develop Procurement Specifications for components. It also provides information to be included in the Procurement Specification in Appendix A and a checklist for design reviews in Appendix B. It does not provide information on distribution elements such as hoses, pipe couplings and general tubing.