5/16 inch Quick Connect to 3/4 in-16 O-ring (-8 AN)

Features:

• Adapts 5/16" quick connect to 3/4"-16 O-Ring Boss
• Male -8 AN straight thread design
• Includes high-quality O-ring for reliable sealing
• Smooth quick-connect for fast hose installation
• Short hex height for tight space clearance
• Made from strong, black anodized aluminum
• Corrosion-resistant finish for long-term durability
• Ideal for custom fuel, oil, and coolant systems
• Lightweight design without sacrificing strength
• Made in the USA with premium craftsmanship
• 1-year limited parts warranty included
• Precision machined for leak-free performance

Fast Connections Made for Serious Builds

When it comes to getting your custom project finished the right way, the small parts matter just as much as the big ones. The Fleece 5/16" Quick Connect to 3/4"-16 O-Ring Adapter gives you a clean, hassle-free way to tie your system together without leaks or headaches. Designed for fast installation, this fitting helps you move quicker through plumbing up fuel, oil, or coolant lines without sacrificing strength where it counts. Its compact profile and short hex height are perfect when space is tight, making it a real lifesaver in crowded engine bays. Plus, the black anodized finish not only looks sharp but holds strong against corrosion, heat, and the everyday punishment of a working truck. Proudly made in the USA, this adapter is built with the kind of precision and quality you want under the hood. When you need a fitting that works as hard as you do, trust Fleece to deliver.

Compact & Precision Fit for High-Pressure Systems

The Fleece FPE-34552-A Quick Connect Adapter is a high-performance solution for connecting 5/16" quick-connect hoses to 3/4"-16 O-Ring Boss (-8 AN) ports. Machined from durable black anodized aluminum, this fitting offers excellent resistance to corrosion and wear while maintaining a lightweight footprint. It features a male AN straight thread design along with a high-quality O-ring for a secure, leak-resistant seal in even the most demanding fluid systems. Its short hex body makes it ideal for tight clearances where larger fittings simply won’t fit. Designed for universal use across fuel, oil, and coolant applications, it’s a must-have for clean, efficient plumbing jobs. Every detail is engineered for performance and longevity, right down to the smooth quick-connect engagement that simplifies installation. With Fleece’s commitment to quality and a 1-year limited warranty backing it up, this adapter brings professional-grade reliability to your build.

Fits: Universal

Notes:

• Adapts 5/16" quick-connect hose to 3/4"-16 O-Ring Boss (-8 AN)
• Male straight-thread design ensures strong, leak-free seal
• Includes O-ring for added sealing reliability
• Short hex height ideal for tight or compact installs
• Made from lightweight black anodized aluminum
• Corrosion-resistant finish for long service life
• Great for fuel, coolant, and oil line applications
• Quick-connect fitting simplifies installation process
• Not designed for high-vibration applications without additional support
• Made in the USA with premium manufacturing standards
• Includes a 1-year limited parts warranty
• California residents must review Prop 65 warnings