This SAE Aerospace Recommended Practice (ARP) presents a recommended part numbering scheme for fluid system component parts, which may require complex standard numbers. Standardizing on certain numbering systems provides for numbering simplicity, ease of interchangeability and supersession (when required), standardization and limitation of usable codes.

This ARP is similar to ISO/TC20/SC10 and its usage is recommended for commonality in international standard part numbering practices.

Purpose

The purpose of this ARP is to consider the part numbering system for hose assemblies, fittings, and clamps. Other components may be added later.

Each component type has established standard codes, which are unique to that type and cannot be interchanged with other component types.

The recommendations shown herein are based on the inch system of measurement. Recommendations based on the metric system of measurement are in coordination in ISO/TC20/SC10.

Use of these codes is expected, but is not obligatory, when defining characteristics of components covered by this practice. Codes, other than those specified in this practice, that appear on existing standards may continue to be used and are not necessarily considered to be in contradiction with this practice.