The STRATOFLEX 171-4K is a high-performance aerospace-grade PTFE hydraulic hose designed for medium temperature and high-pressure fluid transfer in aircraft systems. It is part of the Stratoflex 171 series, widely used in certified aviation hydraulic systems such as flight controls, landing gear, and engine accessory systems.

This hose features a conductive PTFE inner tube with a high-density stainless steel wire braid reinforcement, allowing it to safely handle continuous working pressures up to 3000 PSI while maintaining flexibility and resistance to vibration, chemical exposure, and temperature extremes.

The “4” designation corresponds to a 1/4" nominal size, making it suitable for compact hydraulic lines where space and bend radius constraints are critical.

Key features include:

Aerospace-grade PTFE inner tube (conductive to prevent static buildup)
Stainless steel wire braid reinforcement for high-pressure strength
Rated working pressure: 3000 PSI
Burst pressure: up to ~12,000–16,000 PSI depending on temperature rating
Temperature range: approx. -54°C to +204°C (-65°F to +400°F)
Designed for aircraft hydraulic systems (FAA / AS1339 / MIL-H-38360 heritage standards)
Excellent resistance to aviation hydraulic fluids, fuels, and oils
High vibration and impulse resistance for aircraft environments
Lightweight compared to rubber hydraulic hose equivalents
Small bend radius for tight routing in aircraft installations
Unlimited shelf life (no rubber aging degradation)
Commonly used in flight control, landing gear, and engine systems