9/16 inch -18 Hex Socket Plug with O-Ring

Features:

• 9/16"-18 threaded hex socket plug with integrated O-ring

• Designed to seal fuel, oil, or hydraulic system ports

• Precision-machined for accurate fit and leak-free performance

• Includes durable O-ring to withstand high pressure and fluid exposure

• Hex socket design allows easy installation in tight spaces

• Corrosion-resistant construction for long-term reliability

The Fleece FPE-SP-91618 Hex Socket Plug is the ideal solution for sealing 9/16"-18 threaded ports in high-pressure automotive and industrial applications. Whether you're capping off an unused fuel rail port or sealing hydraulic fittings, this plug ensures a tight, secure fit and long-lasting durability. The included O-ring adds an extra layer of protection, preventing fluid leaks even in extreme environments.

Fitment: Universal – fits systems using a 9/16"-18 threaded port
Warranty: Limited lifetime warranty from Fleece Performance
Fitment Notes: Always confirm thread size before installation. Suitable for fuel, oil, and hydraulic applications across a wide range of vehicles and systems.