CB-SP-6FN-QA Flat-Face Hydraulic Coupler
Designed for Heavy-Duty, High-Pressure Environments
The CB-SP-6FN-QA is a flat-face hydraulic quick coupler designed for secure operation in demanding mobile and industrial systems.
What sets this model apart is its integrated sleeve-locking device, which provides extra protection against accidental disconnection — even under vibration, load shift, or repeated handling.
This coupler is ideal for lift systems, hydraulic jacks, public works equipment, and other critical applications where reliability and operator safety are essential.
Key Features
• Push-to-Connect Mechanism
Enables fast, tool-free connection to hydraulic lines and accessories.
• Sleeve Locking Device
Prevents unintended disconnection by locking the sleeve in position once fully engaged. Increases safety during operation.
• High Working Pressure
Handles up to 350 bar / 5075 PSI, suitable for heavy-duty systems including high-force actuators and mobile machines.
• Optimized Flow Range
Delivers between 12 and 155 liters per minute, depending on size — suitable for a broad range of equipment sizes.
• Flat-Face Valve Design
Reduces fluid loss and contamination during connection/disconnection, especially when used in dusty or exposed environments.
• Wide Size Range
Available from 1/4" up to 1-1/4", covering most common hydraulic interface sizes.
Materials & Sealing
| Component | Material |
| Body / Sleeve / Valves / Ends | Zinc-plated steel with yellow bichromate |
| Springs & Balls | AISI 302 stainless steel |
| Seals | Nitrile rubber (NBR) |
| Dust Cap / Plug | PVC, red (others on request) |
This construction provides a strong balance of corrosion resistance, wear durability, and cost efficiency — ideal for field and mobile use.
Technical Specifications
| Parameter | Value |
| Standard | ISO 16028 |
| Connection Method | Push-to-connect + sleeve locking |
| Valve Type | Flat-face, dry-break |
| Max Working Pressure | 350 bar / 5075 PSI |
| Rated Flow | 12 to 155 L/min |
| Temperature Range | –20°C to +100°C (–4°F to +212°F) |
| Seal Material | Nitrile (NBR) standard |
• Spillage and air inclusion minimized due to flat-face structure.
• Fully interchangeable with Hansen QA29000 Series and equivalents.
Typical Applications
• Hydraulic Jacks & Pumps
Connects securely even under load; locking sleeve prevents accidental disconnect during lift or hold.
• Construction & Public Works Vehicles
Used in dozers, cranes, trenchers, and municipal utility vehicles.
• Agricultural Equipment
Ensures safe and clean hydraulic tool exchange on tractors, harvesters, and attachments.
• Industrial Handling & Automation
Ideal for robots, hydraulic arms, and rail or steel systems operating under constant cycles.
Dimensional Overview
Female (Socket)
| Body Size | PARTNO. | Thread | A | B | HEX |
| 1/4" | CB-S2S-6FN-A | 1/4-18 | 2.07 | 1.06 | 0.91 |
| 1/4" | CB-S2S-6FG-A | 1/4-19 | 2.07 | 1.06 | 0.91 |
| 3/8" | CB-S3S-6FN-A | 3/8-18 | 2.81 | 1.26 | 1.06 |
| 3/8" | CB-S3S-6FG-A | 3/8-19 | 2.81 | 1.26 | 1.06 |
| 1/2" | CB-S4S-6FN-A | 1/2-14 | 2.81 | 1.26 | 1.06 |
| 1/2" | CB-S4S-6FG-A | 1/2-14 | 2.81 | 1.26 | 1.06 |
| 3/4" | CB-S6S-6FN-A | 3/4-14 | 3.11 | 1.50 | 1.38 |
| 3/4" | CB-S6S-6FG-A | 3/4-14 | 3.11 | 1.50 | 1.38 |
| 1" | CB-S8S-6FN-A | 1-11 | 3.29 | 1.89 | 1.81 |
| 1" | CB-S8S-6FG-A | 1-11 | 3.29 | 1.89 | 1.81 |
Male (Plug)
| Body Size | PARTNO. | Thread | C | D | E | HEX |
| 1/4" | CB-P2S-6FN-A | 1/4-18 | 2.11 | 0.98 | 1.71 | 0.91 |
| 1/4" | CB-P2S-6FG-A | 1/4-19 | 2.11 | 0.98 | 1.71 | 0.91 |
| 3/8" | CB-P3S-6FN-A | 3/8-18 | 2.64 | 1.30 | 2.03 | 1.18 |
| 3/8" | CB-P3S-6FG-A | 3/8-19 | 2.64 | 1.30 | 2.03 | 1.18 |
| 1/2" | CB-P4S-6FN-A | 1/2-14 | 2.76 | 1.30 | 2.15 | 1.18 |
| 1/2" | CB-P4S-6FG-A | 1/2-14 | 2.76 | 1.30 | 2.15 | 1.18 |
| 3/4" | CB-P6S-6FN-A | 3/4-14 | 2.83 | 1.56 | 2.13 | 1.38 |
| 3/4" | CB-P6S-6FG-A | 3/4-14 | 2.83 | 1.56 | 2.13 | 1.38 |
| 1" | CB-P8S-6FN-A | 1-11 | 3.21 | 1.97 | 2.38 | 1.81 |
| 1" | CB-P8S-6FG-A | 1-11 | 3.21 | 1.97 | 2.38 | 1.81 |
Figure: CB-SP-6FN-QA quick coupler set
Shown are the female and male connectors with flat-face design and sleeve-locking structure, finished in corrosion-resistant zinc-plated steel.Suitable for use in mobile hydraulics, public works, and rail industry systems.
FAQ
Q: What makes the QA version different from standard ISO 16028 couplers?
A: The QA model includes a sleeve-locking mechanism that prevents disconnection by vibration or impact — an extra safety measure in high-risk environments.
Q: Can I use this with standard ISO 16028 flat-face fittings?
A: Yes. It is fully compatible with all ISO 16028-compliant models, including Hansen QA29000 and others.
Q: Is it suitable for outdoor or exposed environments?
A: Absolutely. The flat-face valves reduce contamination, and the locking sleeve ensures secure operation even when hoses are dragged or shaken.
Related Models
Looking for stainless steel or diagnostic variants?
Compare with:
CB-SP-6FN-DB – 316L Stainless Version »
