Hose Fitting #4 Straight PTFE Black

The FRAGOLA Hose Fitting #4 Straight PTFE Black (model 680104-BL) is an essential component for custom fuel system builds, hydraulic cooling loops, and high-performance engine bay plumbing. This straight adapter fitting serves as the backbone of leak-free connections in demanding automotive applications, from street machines and track cars to off-road builds where reliability under pressure is crucial.

Engineered with PTFE (polytetrafluoroethylene) sealing technology, this fitting provides superior chemical resistance and maintains integrity across temperature swings common in engine bays. The straight configuration eliminates flow turbulence and pressure loss compared to elbows, making it ideal for fuel delivery, coolant circulation, and vacuum-assisted systems where direct paths are critical. Its lightweight design ensures minimal impact on overall vehicle performance.

The #4 size fitting is a workhorse diameter for most mid-range fuel system upgrades, intercooler piping, and closed-loop cooling applications. This fitting is particularly beneficial for those looking to enhance their vehicle's performance and reliability in high-demand situations. With its compact dimensions and lightweight design, it is an excellent choice for any automotive enthusiast.