The Rolls-Royce 23030980 is an OEM aerospace hydraulic/pneumatic line fitting configured as a 90-degree run tee for No.4 flared tube systems. It is used in aircraft engine accessory and fluid routing systems where controlled branching of fluid lines is required under high-vibration and high-temperature operating conditions.

This component is typically found in Rolls-Royce (Allison) turbine engine installations, especially helicopter and light turbine engine fluid systems, where it supports routing of fuel, oil, or hydraulic fluid through flared-tube (AN-style compatible geometry) connections.

The “No.4” designation refers to the tube size standard in aerospace flared tubing systems, indicating compatibility with small-diameter fluid lines used in engine accessory and lubrication circuits. The tee is precision-machined to ensure leak-free sealing when used with proper flared fittings and torque specifications.

Key features include:

OEM Rolls-Royce aerospace fluid system fitting
90° tee configuration for flared tube routing
Designed for No.4 aerospace tube size systems
Used in engine fuel, oil, or hydraulic line distribution systems
High-pressure vibration-resistant metallic construction
Precision flared-seat sealing interface (leak-tight under torque spec)
Compatible with Rolls-Royce Allison engine accessory systems
Designed for aircraft turbine environment (temperature + vibration cycles)
Corrosion-resistant aerospace alloy construction
Used in certified aviation maintenance and overhaul procedures
Typically replaced or inspected during engine teardown or line servicing
CAGE Code 63005 associated OEM aerospace component