Brand： Junxun

Overview：
The Junxun MS21913-4 Plug is a precision aircraft maintenance component designed to seal and protect flareless tube fittings used in aviation hydraulic, pneumatic, fuel, and fluid system applications. Engineered for reliable fit and secure closure, this plug helps prevent contamination, moisture ingress, and foreign object debris (FOD) from entering exposed tube connections during aircraft maintenance, inspection, storage, and transportation procedures. The MS21913-4 provides dependable protection for critical aircraft systems and supports safe, efficient maintenance operations in professional aerospace environments.

Key Points：

Specialized flareless tube plug designed for aircraft fluid system protection applications
Provides secure sealing for exposed flareless tube fittings during maintenance procedures
Helps prevent contamination, moisture, and FOD intrusion into critical aircraft systems
Precision-engineered design ensures accurate fit and reliable sealing performance
Durable construction suitable for repeated use in demanding aerospace maintenance environments
Ideal for airlines, MRO facilities, and professional aircraft maintenance teams

Application：
Ideal for airlines, aircraft MRO facilities, and maintenance technicians performing aircraft inspection, repair, overhaul, and preservation procedures. The MS21913-4 Plug – Flareless Tube is used to seal and protect exposed flareless tube fittings in aircraft hydraulic, pneumatic, fuel, and fluid systems, helping maintain system cleanliness, prevent contamination, and protect critical components during maintenance and storage operations.