Inlet Plug 7/8-20 Blank Black

The FRAGOLA Inlet Plug 7/8-20 Blank Black (part number 491980-BL) is a precision-engineered hydraulic and pneumatic fitting designed to seal unused ports in fluid systems. This black anodized aluminum plug features a 7/8-20 thread size with a hex head design for secure, wrench-tight installation and a machined aluminum washer that distributes pressure evenly across the connection point to prevent leakage and damage to port threads.

The 7/8-20 thread specification indicates a 7/8-inch diameter with 20 threads per inch, a common SAE standard in industrial hydraulic systems, agricultural equipment, and mobile machinery. Aluminum construction with black anodide finish provides corrosion resistance in harsh environments while maintaining excellent lightweight characteristics. The integrated aluminum washer acts as a sealing surface, critical in systems operating under pressure where port integrity directly impacts system reliability and safety. The hex head allows proper torque application without over-tightening, which is essential to avoid stripping threads in aluminum manifolds.

This fitting is specified for technicians and equipment operators maintaining hydraulic systems in construction, farm equipment, industrial machinery, and mobile applications where unused ports must be sealed against contamination and fluid loss. A single blank plug addresses the need to cap off unused ports during system assembly, service, or reconfiguration. FRAGOLA fittings are widely recognized in the automotive and industrial sectors for consistent dimensional accuracy and reliable performance in demanding environments.

When ordering replacement or service plugs, verify your system's thread size and pressure rating to ensure compatibility. The black anodized finish is a cosmetic and protective enhancement standard in FRAGOLA's product line for SAE fittings.