Thread-to-Connect Hydraulic Quick Couplings
What Are Thread-to-Connect Hydraulic Couplings?
Carterberg’s thread-to-connect hydraulic quick couplings are purpose-built for high-pressure, high-vibration, and residual-pressure hydraulic systems. Unlike push-to-connect designs, these couplers engage via threaded locking mechanisms—ensuring leak-free performance, safety under load, and long-term structural stability.
They are widely used in industries where reliability, residual-pressure handling, and mechanical locking are essential: mining hydraulics, oilfield equipment, mobile construction machinery, and utility vehicles.
Why Engineers Choose Carterberg?
| Feature | Description |
| Secure Threaded Engagement | Prevents disconnects from vibration or pressure spikes. |
| Residual Pressure Connection Capability | Safe coupling even when trapped hydraulic pressure is present. |
| Robust Construction | Hardened steel or high-strength brass options, fatigue and shock resistant. |
| Multiple Valve Configurations | Flat-face, dual shut-off, and tubular for media control. |
| Seal Material Versatility | NBR, Viton, or EPDM seals for various fluids and temperature ranges. |
| International Thread Standards | BSP, NPT, and metric compatibility. |
| Corrosion Resistance Options | Yellow zinc or zinc-nickel plating for harsh environments. |
Carterberg Connection Structures
| Coupling Type | Description | Best For |
| Wing Nut Threaded | Manual fine-pitch thread, ideal for residual pressure handling. | Mining, hydraulic jacks |
| Flat-Face + Threaded Lock | Clean disconnection, non-spill, and vibration-resistant. | Oil rigs, mobile platforms |
| Compact Threaded with Sleeve Lock | Short profile, sealed exterior, dust and debris protection. | Utility vehicles, narrow installs |
| Brass Threaded Coupling | Cost-effective, corrosion-resistant, low-pressure rated. | Road service equipment, light-duty systems |
Designed for Demanding Industries
Carterberg thread-to-connect couplings are trusted across sectors:
• Mining & Drilling Systems
Rugged wing nut connections endure pressure and grit underground.
• Utility & Municipal Vehicles
Short-body, lockable couplers withstand daily connection cycles in compact systems.
• Oil & Gas Field Equipment
Flat-face threaded types maintain pressure integrity under thermal shock.
• Heavy Construction Machinery
Connect under load, disconnect without spillage or damage.
Carterberg Threaded Hydraulic Quick Couplings – Model Overview
Hydraulic systems that operate reliably in harsh environments often rely on threaded quick change fittings that are structurally stable, securely connected, and have consistent performance. The following is a parameter comparison and typical characteristic overview of the main models of the Carterberg thread series, which can be quickly selected according to different working pressures, sealing requirements, and application scenarios.
Overview of Model Parameters
| Model | Pressure Rating | Size Range | Seal Type | Distinct Features | Typical Applications |
| CB-SPS-3FN-FD86 | 750 PSI | 1" / 1-1/4" | FKM / EPDM | Flat-face design, residual pressure connection, heavy-duty sleeve | Construction equipment, mobile hydraulics |
| CB-SPS-3FN-96 | 3000 PSI | 1" / 1-1/4" | FKM / EPDM | Compact body, minimized fluid loss, vibration resistant | Excavators, high-flow tools |
| CB-HYDRAV-KD | 6525 PSI | 1/4" to 1-1/2" | NBR / FKM | Heavy-duty valve, push-pull body, robust locking | Agriculture, mining service trucks |
| CB-SPB-3FN | 3000 PSI | 1/4" to 1" | NBR / FKM | ISO interchange, dual seal, chrome plating | Military vehicles, power units |
| CB-SPS-3FN-BC | 4000 PSI | 1/2" to 1-1/2" | NBR / FKM | Compact head, high flow capacity, impact resistant | Utility service trucks, mobile cranes |
| CB-SPS-3FN-BE | 5000 PSI | 3/4" to 2" | NBR | ACME thread, connect under residual pressure, Faster/VOF compatible | Oil & Gas, high pressure skids |
| CB-SPS-3FN-BA | 10000 PSI | 1/4" to 1-1/2" | NBR / FKM | Safety sleeve, flat-face, dust cap integrated | Forestry machinery, railway hydraulics |
| CB-SPS-3FN-CVV | 5000 PSI | 3/8" to 1" | FKM | Stainless steel, corrosion resistant, high temp capability | Offshore, food processing |
| CB-SPS-3FN-W26000 | 9425 PSI | 1/4" to 1-1/2" | FKM | Viton seals, anti-vibration, laser etched body | Aerospace ground systems, heavy construction |
| CB-SPS-3FN-W6000 | 15,950 PSI | 1/4" to 2" | FKM / EPDM | Rugged build, pressure spike tolerant, color coded sleeve | Mining, mobile drilling rigs |
| CB-SPS-3FN-WA56000 | 10000 PSI | 1/4" / 3/8" | FKM | Mini body, narrow bore, static seal enhancement | Compact hydraulic circuits, automated tools |
Typical application interpretation and model details
• CB-SPS-3FN-FD86 is a heavy-duty quick change solution designed by Carterberg for mobile hydraulic equipment. It adopts a flat valve structure and dual sealing, which can effectively reduce the risk of oil leakage during disconnection. The casing system with spiral lock binding supports residual pressure connection, especially suitable for repeatedly inserted pouring stations and construction environments. ⬆View details →
• CB-SPS-3FN-96 continues the structural advantages of the FD86 series, but is more suitable for the high flow requirements of compact devices. Its short body design reduces installation interference and is suitable for scenarios such as crushers and handheld hydraulic tools with limited space. ⬆ View details →
• CB-HYDRAV-KD is an industrial grade quick change connector with high reliability level, combined with a push in connection structure and sturdy locking spiral, suitable for mining and agricultural maintenance vehicle systems that require fast response and high-frequency connection. ⬆ View details →
• CB-SPB-3FN is renowned for its ISO interchangeability and dual seal design, making it particularly suitable for upgrading and replacing hydraulic platforms in standardized systems or military industries. The key copper treatment enhances its corrosion resistance. ⬆ View details →
• CB-SPS-3FN-BC emphasizes compact structure and impact protection, adapting to environments such as high-altitude work vehicles and emergency rescue equipment, ensuring sealing reliability in strong vibrations and frequent insertion. ⬆ View details →
• CB-SPS-3FN-BE adopts ACME spiral and large-sized diameter, supports residual pressure connection, and is compatible with Faster OGV/Stucchi VOF systems, making it an ideal choice for high-pressure fields such as oil and gas. ⬆ View details →
• CB-SPS-3FN-BA incorporates a safety lock sleeve and dust-proof outer ring to enhance operational stability in harsh environments, making it suitable for scenarios such as forest equipment and railway maintenance vehicles that require extremely high resistance to overturning. ⬆ View details →
• CB-SPS-3FN-CVV adopts food grade stainless iron and high-temperature Viton sealing, which can resist corrosion and is suitable for high cleanliness requirements systems such as offshore platforms, cleaning systems, pharmaceutical equipment, etc. ⬆ View details →
• CB-SPS-3FN-W26000 is an extreme high-pressure quick change solution with anti vibration and anti lock structure, as well as high-temperature and high-pressure sealing capabilities. It is particularly suitable for aviation ground support and heavy road construction equipment. ⬆ View details →
• CB-SPS-3FN-W6000 is a heavy-duty model designed by Carterberg for underground mining and remote hydraulic platforms, suitable for 6000 PSI pressure and possessing effective resistance to hydraulic impact. ⬆ View details →
• CB-SPS-3FN-WA56000 belongs to the mini high-pressure quick change connector, suitable for fast insertion in ultra compact systems, and the internal sealing design further optimizes fluid control efficiency. ⬆ View details →
Carterberg Commitment to Quality
Every Carterberg coupling is engineered in accordance with ISO performance benchmarks and subjected to real-world testing before shipment. Our solutions are trusted worldwide by OEMs and fleet operators for their:
• Precision machining
• Leak-proof valve design
• Long-term service reliability
• Availability in multiple sealing and thread variants
When it comes to fluid control in unforgiving environments, Carterberg delivers connection confidence.
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