Description
Product Overview
Rock Tech delivers a high‑quality set of hydraulic dust caps and plugs crafted from stable PVC rubber. Each package contains four male caps and four female plug covers in four distinct colours, designed for ISO‑A 1/2 and ISO‑A 3/8 NPT threads. The caps feature a secure cap connector type and a robust 1/2 thread size, ensuring a tight seal that prevents contaminants from entering the hydraulic system. With dimensions of 5.5 x 0.8 x 0.9 inches and a lightweight design (0.15 kg), the set is easy to handle and store.
Usage
These dust caps are perfect for protecting hydraulic couplers in industrial machinery, mobile equipment, and scientific instruments. Use them during storage, transport, or periods of inactivity to keep hydraulic lines clean and free from dust, moisture, and debris. They are especially useful for technicians servicing Parker, Aeroquip, Hansen, and similar brands that adhere to ISO7241‑A and ISO5675 standards.

Why Choose Us
Rock Tech combines premium PVC rubber with precise manufacturing tolerances to deliver caps that resist cracking and deformation under pressure. Each cap is tested for fit and durability, ensuring a reliable seal that extends the life of your hydraulic components. Our four‑colour coding simplifies inventory management, allowing quick identification of male and female parts.
Key Features
- Durable PVC rubber construction for long‑lasting protection
- Fits ISO‑A 1/2 and 3/8 NPT threads, compatible with major brands
- Four‑colour set includes 4 male caps and 4 female plugs
- Compact size and lightweight for easy handling and storage
- Prevents wear, contamination, and costly downtime
FAQ
What thread sizes do these caps support?
The caps are designed for ISO‑A 1/2 and ISO‑A 3/8 NPT threads, matching common hydraulic coupler specifications.
Are the caps reusable?
Yes, the rubber material is resilient and can be removed and reinstalled multiple times without losing sealing performance.
Can I use these caps on non‑ISO couplers?
They are optimized for ISO‑A standards; using them on other thread types may result in an imperfect seal.
What is included in the package?
The set contains four male dust caps and four female plug covers, each in a different colour for easy identification.
Do the caps require any tools for installation?
No tools are needed; simply hand‑tighten the cap onto the coupler to create a secure seal.





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