Fuel Plug Assembly D21 × D5 (FP3050) – RC Fuel Line Sealing & Service Connector

The Fuel Plug Assembly D21 × D5 (Model FP3050) is a purely mechanical fuel system component designed to seal, isolate, or terminate fuel lines during operation, servicing, or transport of RC engines.

It is commonly used in gasoline and nitro RC fuel systems, where clean fuel management and leak prevention are critical to reliability and safety.

Enjoy worldwide shipping for just £2 — regardless of weight or size

Mechanical fuel line isolation made simple and reliable

This product has no MOQ

The Fuel Plug Assembly D21 × D5 (FP3050)  is not just for hobbyists.

While widely used in RC models, this type of fuel plug assembly is also relevant to:

small-engine servicing and maintenance

workshop test setups

demonstration and training rigs

fuel system configuration and evaluation

Because it contains no electronics, reliability depends entirely on correct sizing, hose compatibility, and proper installation — making it a dependable_toggle-style solution for fuel control.

Practical use cases

Temporarily sealing fuel lines during maintenance

Isolating fuel circuits during tuning or testing

Preventing leakage during transport or storage

Supporting clean, organised fuel system layouts

Key Features

Mechanical fuel plug assembly (no electronics)

Dimensions: D21 × D5

Designed for RC gasoline and nitro fuel systems

Suitable for service, maintenance, and system isolation

Compact, lightweight and easy to integrate

Specifications: 

D1=4mm

D2=21mm

D3=5.5mm

This fuel plug assembly is part of our RC Fuel Systems range and is listed under Fuel Line Fittings & Connectors, where you’ll find compatible fuel tubing, connectors and service components for gasoline and nitro RC engines.

Fuel system components such as this plug assembly work in conjunction with engine and ignition hardware, and are typically installed during setup, tuning or maintenance of RC gasoline and nitro engines.

What’s in the Box

1 × Fuel Plug Assembly D21 × D5 (Model FP3050)