CB-SPS-3FN-FD86 Thread-to-Connect Hydraulic Coupler
The CB-SPS-3FN-FD86 is Carterberg’s advanced thread-to-connect hydraulic quick coupling, engineered for high-impulse systems where pressure surges and fluid cleanliness are critical. Based on a dry-break, wing nut/hex nut configuration, it ensures secure connection and minimal fluid loss—even when operating under back pressure.
Designed for industries such as mining, hydraulic tool systems, and bulkhead-mounted fluid transfer, this coupling features a tubular valve structure and metal-to-metal secondary sealing, offering robust performance up to 5000 PSI.
Key Features
• Thread-to-Connect with Wing or Hex Nut
Enables connection under pressure (up to 750 psi) without fluid blowout risk.
• Dry-Break Valve Design
Minimizes fluid loss and prevents air inclusion during connection/disconnection.
• Teflon Back-up Rings + Metal-to-Metal Sealing
Ensures high impulse resistance and long seal life, even under thermal cycling.
• Acme Thread Profile
Resists galling, enhances alignment, and supports repeated connection in harsh environments.
• Steel Flange for Panel/Bulkhead Mounting
Optional flange simplifies integration into rigid system assemblies.
Technical Specifications
| Parameter | Value |
| Model | CB-SPS-3FN-FD86 |
| Type | Thread-to-Connect, Dry Break |
| Connection Style | Wing Nut or Hex Nut |
| Valve Type | Tubular, Dual Shut-Off |
| Seal Material | Buna-N (NBR) |
| Body Material | High-strength carbon steel with zinc trivalent plating |
| Backup Seal | PTFE (Teflon) |
| Max Operating Pressure | 5,000 PSI |
| Connection Under Pressure | Up to 750 PSI |
| Mounting Option | Steel flange (optional) |
| Available Sizes | 1", 1-1/4" |
Dimensional Overview
Female (Socket)
Male (Plug)
| Body Size | PARTNO. | Thread | A | B | HEX |
| 1" | CB-S8S-3FN-G | 1-11 1/2 | 4.98 | 4.50 | - |
| 1" | CB-S8S-3FN-G | 1-11 1/2 | 4.98 | 2.81 | 1.62 |
| 1" | CB-P8S-3FN-G | 1-11 1/2 | 4.40 | 2.11 | 1.75 |
Applications
• Mining Machinery
• Hydraulic Tool Systems
• High-Pressure Mobile Equipment
• Panel-Mounted Transfer Lines
• Oil & Gas Maintenance Units
Carterberg Engineering Insight
The CB-SPS-3FN-FD86 isn’t just another thread-to-connect fitting. By combining high-impulse valve performance, residual pressure tolerance, and rugged Acme threading, Carterberg ensures long-term stability where others fail.
Whether in deep mine operations or pressurized mobile repair stations, this coupling resists vibration, contamination, and over-tightening damage—making it a go-to solution for mission-critical applications.
Interested in Technical Sheets or Samples?
Get in touch for CAD drawings, compatibility guidance, or to request a quote.
Carterberg’s threaded hydraulic series is IATF16949-compatible and ready for custom specification.
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