CAP PLUG (P/N p-18) - New Surplus, New

The p-18 is an HDPE cap plug designed to seal 1/8 NPT-threaded ports on aircraft components during storage and maintenance. This protective cap prevents contamination and moisture intrusion in fuel systems, hydraulic lines, pneumatic connections, and other fluid system ports. Install hand-tight before storage or transport, then remove before returning the component to service.

Lightweight molded construction withstands typical hangar and shop environments. Follow the aircraft maintenance manual and applicable shop procedures for installation and removal protocols.

What is the CAP PLUG (P/N p-18)?

The p-18 is an HDPE cap plug designed to seal 1/8 NPT-threaded ports on aircraft components during storage and maintenance. This protective cap prevents contamination and moisture intrusion in fuel systems, hydraulic lines, pneumatic connections, and other fluid system ports.

Is the p-18 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The CAP PLUG is available in: New Surplus, New. We recommend checking your aircraft's wiring diagrams and STC documentation, or contact our avionics team for compatibility assistance.

Does the p-18 come with an 8130-3 airworthiness tag?

Availability of an FAA 8130-3 tag depends on the part condition. Overhauled and repaired units typically include 8130-3 documentation. As-removed units may include a removal tag with trace history. Contact us for specific documentation on the condition you need.

Do you offer bench testing for the p-18?

We can arrange bench testing through our network of FAA-certified repair stations. Call (904) 998-9101 for testing availability and turnaround times, or submit an RFQ with your specific requirements.