Overview
The Caplugs RCL-10L long-threaded connector cap is a precision-molded protective device designed for threaded or smooth cylindrical surfaces in hydraulic, pneumatic, and industrial applications. This RCL-10L model features extended threaded depth to accommodate longer connection ports, providing superior longitudinal protection where standard caps fall short.
Key Features
- Extended Threaded Design — Longer length (2.66″) accommodates deep-threaded ports and bulkhead fittings without loose fit or over-torque concerns
- Chemical & Weather Resistant — Low-density polyethylene (LD-PE) resists water, hydraulic fluids, oils, and broad range of chemicals
- Simple Push-On Installation — No threads to align; slides onto 7/8″ ports quickly with consistent engagement
- Wide Temperature Range — Maintains flexibility and integrity from -94°F (-70°C) to 175°F (79°C)
- Hydraulic-Grade Standard — Originally engineered for double-threaded bulkhead fittings in aerospace and industrial hydraulic systems
Technical Specifications
- Thread Size (Cap): 7/8″
- Cap Inner Diameter (A): 0.861″
- Cap Outer Diameter (C): 1.01″
- Length (B): 2.66″
- Material: Low-Density Polyethylene (LD-PE)
- Standard Color: Red
- Operating Temperature Range: -94°F to 175°F (-70°C to 79°C)
- Type: Long-Threaded Connector Protection Cap
- Series: RCL (RCL Series)
- Mounting Style: Push-on threaded
Typical Applications
- Hydraulic double-threaded bulkhead fittings on industrial machinery and equipment
- Pneumatic system port protection during maintenance, storage, and transit
- Aerospace and military hydraulic assemblies requiring long-threaded cap compatibility
- Mobile equipment and off-road hydraulic systems exposed to harsh weather
- Component storage and inventory management to prevent dust and moisture ingress
- General purpose connector and port sealing in manufacturing and fleet maintenance
Compatibility & Replacements
Compatible With
- Hydraulic double-threaded bulkhead fittings with 7/8″ thread
- Smooth or threaded cylindrical ports, 7/8″ nominal diameter
- Industrial hydraulic systems (ISO 4401, SAE J518)
- Pneumatic equipment and air-line couplings rated for low-density polyethylene caps
- Equipment storage and transport applications requiring dust and moisture protection
Replaces / Drop-In Replacement For
- Older or damaged RCL-10L caps (direct replacement part)
- Non-threaded connector caps on 7/8″ ports where longitudinal protection is required
- Verify compatibility with your system integrator before ordering if replacing from an unmarked or legacy fitting
Works With
- Caplugs RCL Series family — available in 20 standard sizes for different thread and port configurations
- Hydraulic and pneumatic system maintenance kits and bulk-cap replacement programs
- Compatible with standard 7/8″ UNC, SAE, and metric thread-equivalent ports
