Fitting BitsPower BP-MBCPF-CC3U — brass, black finish for computer cooling systems

BitsPower BP-MBCPF-CC3U is a brass compression fitting with a matt black finish designed for use in custom PC liquid cooling loops. Manufactured from high-quality brass and finished with an e-plated matt black coating, this fitting provides a durable, corrosion-resistant connection between tubing and water-cooling components. The product is engineered with a true hi-flow internal profile and a concealed O‑ring design to maintain neat installations while supporting unrestricted coolant flow.

Advantages

The brass construction offers mechanical strength and long-term corrosion resistance compared with many non-metal fittings, while the matt black e-plated finish resists surface wear and fits common black-themed builds. The hi-flow internal geometry reduces flow restriction, and the hiding O‑ring design improves aesthetics by keeping sealing elements out of sight. The compression-style interface is compatible with soft tubing and provides a secure seal without the need for additional clamps when installed correctly.

Suitable for

• Custom PC liquid cooling loops using soft tubing with 3/8" ID / 5/8" OD (Tygon 3603 compatible)
• Connections between radiators, pumps, reservoirs and water blocks
• PC maintenance and retrofitting where durable, low-profile fittings are required

Key specifications

• Material: high-quality brass
• Finish: matt black e-plated surface
• Design: true hi-flow internal profile
• Seal: concealed O‑ring sealing
• Tubing compatibility: optimized for soft tubing with 3/8" inner diameter and 5/8" outer diameter (Tygon 3603 profile)
• Connection type: compression fitting
• Nominal thread/port size: 1/4"
• Compliance: RoHS compliant materials and processes

How to use

Prepare the tubing by cutting the end square and free of burrs, then slide the compression ring and nut onto the tubing. Insert the tubing fully into the fitting until it seats against the internal stop, then hand-tighten the compression nut. Finish tightening to the manufacturer’s recommended torque to compress the O‑ring and secure the seal; avoid excessive force to prevent deformation of the tubing or damage to the fitting finish. Inspect the connection for proper seating and perform a pressure or leak test before returning the system to normal operation.

Recommendations

Use this fitting with compatible soft tubing (3/8" ID / 5/8" OD) and avoid mixing with incompatible tubing materials that may swell or degrade. During assembly, ensure all mating threads are clean and dry, and perform an initial leak test with low pressure. For long-term reliability, periodically inspect fittings for signs of wear, corrosion, or loosening, especially after thermal cycling or system maintenance.