CB-SPS-3FN-W6000 Stainless Steel Threaded Hydraulic Coupling | Carterberg High-Resistance Series
Built for Pressure. Engineered for Corrosion.
The CB-SPS-3FN-W6000 by Carterberg is a rugged, screw-to-connect hydraulic quick coupling constructed from high-grade stainless steel for maximum durability in aggressive environments. This model is designed to handle residual pressure during connection, making it a reliable solution for offshore platforms, oil and gas systems, and heavy mechanical shock applications.
With a flush-face, double shut-off design, the CB-SPS-3FN-W6000 ensures reduced fluid loss and enhanced contamination control, even in dynamic or corrosive operations.
Key Features
• Thread-to-Connect Coupling
Secure threaded engagement prevents accidental disconnects under load or vibration. Recommended for high-impulse hydraulic applications.
• Stainless Steel Construction
Fabricated from AISI 316L-grade stainless steel (equivalent to 1.4404), this coupler offers excellent corrosion resistance in offshore, marine, or chemical exposure environments.
• Residual Pressure Tolerance
Specially engineered to allow connection even when there is trapped residual hydraulic pressure in the line. Lubrication of thread is recommended when connecting under load.
• Low Fluid Loss + Non-Spill Valve
Flush-face valve design reduces air inclusion and prevents oil spillage during disconnect, supporting long-term cleanliness in closed hydraulic systems.
• Dual Seal Options Available
Equipped with either FKM (Viton) or EPDM elastomers to suit a wide temperature range and various fluid compatibility needs.
Technical Specifications
Parameter |
Value |
Model |
CB-SPS-3FN-W6000 |
Connection Type |
Threaded (manual) |
Valve Design |
Flush-face, double shut-off |
Body Material |
Stainless Steel AISI 316L (1.4404) |
Seal Material |
FKM or EPDM |
Connection Under Residual Pressure |
Yes (socket side) |
Size Range |
1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2" |
Max Operating Pressure |
Up to 15,950 psi (1100 bar) |
Rated Flow |
Up to 94.3 L/min (depending on size) |
Operating Temperature |
-20°C to +200°C (FKM) / -40°C to +150°C (EPDM) |
Dimensional Overview
Female (Socket)

Body Size |
PARTNO. |
Thread |
A |
B |
HEX |
1/4" |
CB-S2S-5FN |
1/4-18 |
53 |
35 |
19 |
1/4" |
CB-S2S-5FG |
1/4-19 |
53 |
35 |
19 |
3/8" |
CB-S3S-5FN |
3/8-18 |
65 |
38 |
23 |
3/8" |
CB-S3S-5FG |
3/8-19 |
65 |
38 |
23 |
1/2" |
CB-S4S-5FN |
1/2-14 |
74 |
45 |
27 |
1/2" |
CB-S4S-5FG |
1/2-14 |
74 |
45 |
27 |
3/4" |
CB-S6S-5FN |
3/4-14 |
91 |
55 |
35 |
3/4" |
CB-S6S-5FG |
3/4-14 |
91 |
55 |
35 |
1" |
CB-S8S-5FN |
1-11 1/2 |
103 |
69 |
41 |
1" |
CB-S8S-5FG |
1-11 |
103 |
69 |
41 |
Male (Plug)

Body Size |
PARTNO. |
Thread |
C |
D |
HEX |
1/4" |
CB-P2S-3FN |
1/4-18 |
35 |
15 |
19 |
1/4" |
CB-P2S-3FG |
1/4-19 |
35 |
15 |
19 |
3/8" |
CB-P3S-3FN |
3/8-18 |
42 |
19 |
23 |
3/8" |
CB-P3S-3FG |
3/8-19 |
42 |
19 |
23 |
1/2" |
CB-P4S-3FN |
1/2-14 |
50 |
22 |
27 |
1/2" |
CB-P4S-3FG |
1/2-14 |
50 |
22 |
27 |
3/4" |
CB-P6S-3FN |
3/4-14 |
63 |
29 |
35 |
3/4" |
CB-P6S-3FG |
3/4-14 |
63 |
29 |
35 |
1" |
CB-P8S-3FN |
1-11 1/2 |
71 |
36 |
41 |
1" |
CB-P8S-3FG |
1-11 |
71 |
36 |
41 |
Applications
• Offshore platforms & subsea equipment
• Oil & gas fluid circuits
• High-vibration mobile hydraulic systems
• Material handling machinery with mechanical shock
• Pressure-sensitive or contamination-controlled systems