Endura Adapter Fitting #4 to 1/8 NPT Straight

The RUSSELL Endura Adapter Fitting #4 to 1/8 NPT Straight is a precision hydraulic and pneumatic adapter designed to bridge #4 AN male ports with 1/8-inch NPT male threads. This straight-configuration adapter serves critical roles in fluid and gas delivery systems where reliable, leak-free connections are non-negotiable—whether in pressure testing, hydraulic recovery equipment, air brake systems, or fuel distribution networks.

Constructed from aluminum and finished with nickel anodization, this adapter resists corrosion while maintaining lightweight characteristics essential in mobile equipment and aerospace applications. The nickel anodized surface provides enhanced durability against moisture and chemical exposure compared to standard anodizing. The straight design eliminates directional concerns during installation, simplifying routing in confined spaces. RUSSELL's precision engineering ensures thread concentricity and seal surface consistency, critical factors in high-pressure environments where thread misalignment or surface imperfections can compromise system integrity.

Technicians and maintenance teams rely on this adapter when retrofitting or repairing systems that combine AN-style quick-disconnect ports with NPT threaded inlets—common in industrial hydraulics, marine equipment, and heavy equipment repair. Its compact footprint (2.6 × 1.65 × 4.85 inches) and minimal weight (0.05 lbs) make it practical for tight installations. Each adapter is sold individually, allowing builders and repair shops to stock specific thread combinations without excess inventory.

RUSSELL manufactures to SAE and ISO standards, ensuring compatibility with industry-standard AN fittings and NPT ports. This adapter is commonly specified in OEM service bulletins for equipment designed across multiple decades, making it a reliable reference part for fleet maintenance and restoration projects.