Micro Cupla
Low pressure up to 19 bar
The Nitto Kohki Micro Cupla is a miniature brass quick coupling for compact pneumatic installations up to 19 bar where space and weight are critical. The 33-item range covers nominal sizes 03, 04, 05 and 10 in plug (PH, PC) and socket (SH, SC) versions as well as extended-reach L variants (PHL, SHL, PCL, SCL). Sockets SH and SC are supplied with NBR seals; plug types have no internal seal. A stainless steel version of the MC-04PH is also available. B variants (MC-04SHB, MC-06SCB, MC-04SCB) incorporate an automatic shut-off on disconnection.
Brass, nominal sizes 03-10 - miniature format for space-saving pneumatic installations
NBR seal (SH/SC sockets) - for general compressed air and pneumatic media up to 19 bar
L variants - MC-04PHL, MC-04SHL, MC-04PCL, MC-06PCL, MC-04SCL, MC-06SCL for extended connection reach
B variants (blind plug) - MC-04SHB, MC-06SCB, MC-04SCB with automatic shut-off on disconnection
SUS variant MC-04PH - stainless steel version for corrosive environments
| Series | Nominal size | Type | Feature |
|---|---|---|---|
| MC-03PH / MC-03SH | 03 | Plug / Socket PH/SH | Standard brass, SH with NBR |
| MC-04PH / MC-04SH / MC-04SHB | 04 | Plug / Socket / Socket blind | SHB with blind-plug function |
| MC-04PHL / MC-04SHL | 04 | Extended plug / socket | Extended reach connection |
| MC-04PC / MC-04SC / MC-04PCL / MC-04SCL / MC-04SCB | 04 | PC/SC variants | PC/SC type, L-extension and blind |
| MC-05PM / MC-05SM | 05 | Plug / Socket PM/SM | Metal thread connection |
| MC-06PC / MC-06SC / MC-06PCL / MC-06SCL / MC-06SCB | 06 | PC/SC variants | Nominal size 06 |
| MC-10PM / MC-10SM | 10 | Plug / Socket PM/SM | Largest Micro Cupla nominal size |
Typical applications: Miniature pneumatics in laboratory equipment and analytical instruments, compact control valves and pneumatic cylinders in confined spaces, medical and dental equipment with miniaturised air connections, pneumatic connections in electronics manufacturing and robotics, and all applications where standard-size quick couplings are too large or too heavy.
Technical data from the manufacturer catalogue
| Series | MICRO CUPLA |
|---|---|
| Body material | CUPLA : Brass (Plated), CUPLA : Stainless steel (SUS304), Tube Fitter Part : Brass (Plated), Tube Fitter Part : Plastic, MICRO LINE CUPLA branch body : aluminum alloy |
| Seal material | Nitrile rubber (NBR), Fluoro rubber (FKM) |
| Max working pressure | 1.0 MPa {10 kgf/cm2} |
| Working temperature | Nitrile rubber (NBR): -20 to +80 deg C | Fluoro rubber (FKM): -20 to +180 deg C |
| Valve structure | One-way shut-off |
| Applicable fluids | Air, Water (Tube Fitter type is unsuitable for water.) |
| Vacuum service | Operational when connected, at 53.0 kPa {400 mmHg}. Not applicable for socket only or plug only. |
| Size range | Thread 1/8 inch, M5x0.8. Tube barb tube ID o3, o4. Tube barb (Tube fitter): polyurethane tube outside dia. o4 +/-0.1, o6 +/-0.1; polyamide tube outside dia. o4 +0.05/-0.08, o6 +0.05/-0.08; fluorine contained resin tube outside dia. o4 +/-0.05, o6 +/-0.07 |
| Catalogue page | C01en-b, 23 |
Operating principle
- Compact, lightweight CUPLA with only 9.5 mm outer diameter.
- Push-to-connect operation. Tube Fitter type for even easier tube insertion.
- Even though the valve is built in the socket, the sleeve outer diameter is confined to 9.5 mm.
- Push-to-connect design.
- Compact design for piping in narrow spaces.
- Plated brass and stainless steel bodies are available for excellent corrosion resistance.
- Available in various end configurations to satisfy a wide range of pneumatic applications.
- Stainless Steel Models: highly corrosion-resistant stainless steel MICRO CUPLA.
All models of the series
PH - Tube barb (hose barb)
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | A | C | øoB | øoH | øoT |
|---|---|---|---|---|---|---|---|---|---|---|
| MC-03PH | Plug | 3 mm ID tube | 1.2 | - | 19 | 8 | 9.2 | 1.2 | 5.5 | 3.5 |
| MC-04PH | Plug | 4 mm ID tube | 1.4 | 1.3 | 19 | 8 | 9.2 | 2.5 | 5.5 | 4.8 |
SH - Tube barb (hose barb)
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | A | øoB | øoD | øoT |
|---|---|---|---|---|---|---|---|---|---|
| MC-03SH | Socket | 3 mm ID tube | 7 | - | (27.5) | 8 | 1.2 | 9.5 | 3.5 |
| MC-04SH | Socket | 4 mm ID tube | 7.3 | 6.7 | (27.5) | 8 | 2.5 | 9.5 | 4.8 |
PM-M5 - Male thread
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | A | C | T | øH(WAF) | øoB |
|---|---|---|---|---|---|---|---|---|---|---|
| MC-05PM | Plug | M5x0.8 | 1.9 | 2.2 | 17 | 4.5 | 9.2 | M5x0.8 | Hex.7 (brass), Hex.8 (stainless steel) | 2.5 |
SM-M5 - Male thread
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | A | T | øH(WAF) | øoB | øoD |
|---|---|---|---|---|---|---|---|---|---|---|
| MC-05SM | Socket | M5x0.8 | 7.4 | 6.8 | (24.5) | 4.5 | M5x0.8 | Hex.9 | 2.5 | 9.5 |
PM-R18 - Male thread
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | C | T | øH(WAF) | øoB |
|---|---|---|---|---|---|---|---|---|---|
| MC-10PM | Plug | Rc 1/8 | 9 | 8.1 | 26 | 9.2 | R 1/8 | Hex.11 | 2.5 |
SM-R18 - Male thread
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | T | øH(WAF) | øoB | øoD |
|---|---|---|---|---|---|---|---|---|---|
| MC-10SM | Socket | Rc 1/8 | 13.1 | 12.1 | (30) | R 1/8 | Hex.11 | 3 | 9.5 |
PHL - Tube barb (hose barb), L-shaped
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | A | C | øB | øE | øoBp | øoT |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MC-04PHL | Plug | 4 mm ID tube | 9.4 | 9 | (23.3) | 8 | 9.2 | (18.3) | 18 | 2.5 | 4.8 |
SHL - Tube barb (hose barb), L-shaped
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | A | C | øE | øoB | øoD | øoT |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MC-04SHL | Socket | 4 mm ID tube | 14.8 | 13.6 | (30.8) | 8 | (25.8) | 18 | 2.5 | 9.5 | 4.8 |
SHB - Tube barb, for panel mounting
| Model | Coupling part | Application | Brass (g) | Stainless steel (g) | L | A | øF | øH(WAF) | øHs(WAF) | øoB | øoD | øoJ | øoT |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MC-04SHB | Socket | 4 mm ID tube | 11.5 | 10.6 | (36) | 8 | 1.2 to 3.5 | Hex.9 | Hex.11 | 2.5 | 9.5 | 7.1 +0.3 / 0 | 4.8 |
PC - With Tube Fitter
| Model | Coupling part | Application | Brass (g) | L | C | øoB | øoT |
|---|---|---|---|---|---|---|---|
| MC-04PC | Plug | 4 mm OD tube | 3 | (21.7) | 9.2 | 2.5 | 8 |
| MC-06PC | Plug | 6 mm OD tube | 5 | (25) | 9.2 | 2.5 | 9.8 |
SC - With Tube Fitter
| Model | Coupling part | Application | Brass (g) | L | C | øoD | øoT |
|---|---|---|---|---|---|---|---|
| MC-04SC | Socket | 4 mm OD tube | 9 | (31.5) | (12) | 9.5 | 8 |
| MC-06SC | Socket | 6 mm OD tube | 11.5 | (33.5) | (13) | 9.5 | 9.8 |
PCL - With L-shaped Tube Fitter
| Model | Coupling part | Application | Brass (g) | L | C | øE | øoB | øoT |
|---|---|---|---|---|---|---|---|---|
| MC-04PCL | Plug | 4 mm OD tube | 10 | (23.3) | 9.2 | (18.3) | 2.5 | 8 |
| MC-06PCL | Plug | 6 mm OD tube | 13.5 | (24.3) | 9.2 | (18.8) | 2.5 | 9.8 |
SCL - With L-shaped Tube Fitter
| Model | Coupling part | Application | Brass (g) | L | C | øE | øoD | øoT |
|---|---|---|---|---|---|---|---|---|
| MC-04SCL | Socket | 4 mm OD tube | 16 | (30.8) | (10) | (25.8) | 9.5 | 8 |
| MC-06SCL | Socket | 6 mm OD tube | 19 | (31.8) | (12.5) | (26.3) | 9.5 | 9.8 |
SCB - With Tube Fitter for panel mounting
| Model | Coupling part | Application | Brass (g) | L | øF | øH(WAF) | øHs(WAF) | øoD | øoE | øoJ |
|---|---|---|---|---|---|---|---|---|---|---|
| MC-04SCB | Socket | 4 mm OD tube | 15 | (34) | 3.5 or less | Hex.13 | Hex.13 | 9.5 | 16 | 10.5 +0.3 / 0 |
| MC-06SCB | Socket | 6 mm OD tube | 18.5 | (36) | 3.5 or less | Hex.15 | Hex.15 | 9.5 | 18 | 12.5 +0.3 / 0 |
LINE - MICRO LINE CUPLA branch block with MC-05SM sockets
| Model | Coupling part | Application | Aluminium (g) |
|---|---|---|---|
| MC-03 | socket block | MC-05SM (3 pcs.), inlet 2xRc 1/8 | 65 |
| MC-05 | socket block | MC-05SM (5 pcs.), inlet 2xRc 1/8 | 101 |
| MC-10 | socket block | MC-05SM (10 pcs.), inlet 2xRc 1/8 | 187 |
Dimensions in millimetres. Values in brackets apply in the connected condition.
Legend: L = overall length; H = width across flats or outside dimension; D = socket outside diameter; A = hose barb length; C = sleeve dimension; T = thread or barb size; B = bore
Series comparison
| Series | Max working pressure | Size range | Valve structure | Applicable fluids |
|---|---|---|---|---|
| MICRO CUPLA | 10 bar | Thread 1/8 inch, M5x0.8. Tube barb tube ID o3, o4. Tube barb (Tube fitter): polyurethane tube outside dia. o4 +/-0.1, o6 +/-0.1; polyamide tube outside dia. o4 +0.05/-0.08, o6 +0.05/-0.08; fluorine contained resin tube outside dia. o4 +/-0.05, o6 +/-0.07 | One-way shut-off | Air, Water (Tube Fitter type is unsuitable for water.) |
| COMPACT CUPLA | 10 bar | Thread 1/8 inch; tube barb for ø4 x ø6 and ø6 x ø8 tube | Two-way shut-off | Air, Water |
| CUBE CUPLA | 10 bar | 4 mm and 6 mm ID tube, 1/8 inch | Two-way shut-off, one-way shut-off or straight through, depending on the combination of valved and valveless socket and plug. | Air, Water |
| FULL BLOW CUPLA | 15 bar | Thread and hose barb 1/4 inch, 3/8 inch, 1/2 inch. SN type for urethane hose: for dia. 6.5 mm x dia. 10 mm, dia. 8 mm x dia. 12 mm, dia. 8.5 mm x dia. 12.5 mm and dia. 11 mm x dia. 16 mm polyurethane hose. | One-way shut-off | Air |
| HI CUPLA 200 | 15 bar | Thread and hose barb 1/4 inch, 3/8 inch, 1/2 inch. Tube barb (Tube fitter): Polyurethane tube outer dia. 6 +/-0.1, 8 +/-0.15, 10 +/-0.15; Polyamide tube outer dia. 6 +0.05/-0.08, 8 +0.05/-0.1, 10 +0.05/-0.1; Fluorine contained resin tube outer dia. 6 +/-0.07, 8 +/-0.07, 10 +/-0.07. | One-way shut-off | Air |
| HI CUPLA ACE | 15 bar | Thread and hose barb 1/4 inch, 3/8 inch; PN, SN, PNG and SNG types for ø5 mm x ø8 mm, ø6 mm x ø9 mm, ø6.5 mm x ø10 mm, ø8 mm x ø12 mm and ø8.5 mm x ø12.5 mm polyurethane hose | One-way shut-off | Air, Water |
| HI CUPLA | 15 bar | Thread and hose barb 1/8 inch to 1 inch, 1/4 inch to 1 inch hose | One-way shut-off | Air, Water |
| LEVER LOCK CUPLA | 18 bar | Metal body: 3/4 inch to 4 inch. Plastic body: 3/4 inch, 1 inch, 1 1/2 inch, 2 inch, 3 inch. | Straight through | Water, Hydraulic oil, Air, Powder, Steam |
Pick MICRO CUPLA for piping in pneumatic control devices where space is tight: the sleeve outer diameter stays at 9.5 mm although the shut-off valve is built into the socket, which the other 1.0 MPa {10 kgf/cm2} series SMALL CUPLA, COMPACT CUPLA, CUBE CUPLA and SUPER CUPLA do not offer. It is one-way shut-off and rated 1.0 MPa {10 kgf/cm2}, so it serves control air rather than the 1.5 MPa {15 kgf/cm2} lines covered by HI CUPLA, HI CUPLA 200, FULL BLOW CUPLA, LINE CUPLA 200 and HI CUPLA ACE. Where both sides have to shut off, choose the two-way shut-off COMPACT CUPLA instead.
Body and seal materials
| Body material |
|---|
| CUPLA : Brass (Plated) |
| CUPLA : Stainless steel (SUS304) |
| Tube Fitter Part : Brass (Plated) |
| Tube Fitter Part : Plastic |
| MICRO LINE CUPLA branch body : aluminum alloy |
| Seal material | Mark | Working temperature | Remarks |
|---|---|---|---|
| Nitrile rubber (NBR) | - | -20 to +80 deg C | Standard material |
| Fluoro rubber (FKM) | - | -20 to +180 deg C | Made-to-order item |
Further catalogue data
| Note | Value |
|---|---|
| Pressure unit conversion | Working pressure 1.0 MPa / 10 kgf/cm2 / 10 bar / 145 PSI |
| Maximum tightening torque, Nm {kgf cm} | M5x0.8: 1.3 {13} (brass and stainless steel). R 1/8: brass 5 {51}, stainless steel 7 {71} |
| Flow direction | Fluid flow can be bi-directional when socket and plug are connected. |
| Minimum cross-sectional area (mm2) | MC-03SP: 1.1; MC-04SP: 4.9; MC-05SP: 4.9; MC-10SP: 4.9; Tube Fitter Type for 4 mm OD tube: 4.9; Tube Fitter Type for 6 mm OD tube: 4.9 |
| Scope of specifications | Above specifications apply only to CUPLA. Maximum working pressure and working temperature range may vary depending on tube materials you use with and the working temperature. |
| MICRO LINE CUPLA MC-03 type | Three branch ports, mass 65 g, MC-05SM (3 pcs.), branch body made of aluminum alloy, inlet 2xRc 1/8, 3.2 mm dia. through hole (4 pcs.) |
| MICRO LINE CUPLA MC-05 type | Five branch ports, mass 101 g, MC-05SM (5 pcs.), branch body made of aluminum alloy, inlet 2xRc 1/8, 3.2 mm dia. through hole (4 pcs.) |
| MICRO LINE CUPLA MC-10 type | Ten branch ports, mass 187 g, MC-05SM (10 pcs.), branch body made of aluminum alloy, inlet 2xRc 1/8, 3.2 mm dia. through hole (4 pcs.) |
| Panel mounting dimension keys | F: Thickness of panel. oJ: Diameter of mounting hole. |
| WAF | WAF stands for width across flats. |
| Flow rate | Pressure - flow characteristics are given as a graph on page 24. Test conditions: fluid air, tube size o4 mm x o2.5 mm and o6 mm x o4 mm (Micro Cupla with Tube Fitter). Curves: 1 MC-06SCxMC-06PC, 2 MC-05SMxMC-05PM, 3 MC-04SCxMC-04PC, 4 MC-06SCLxMC-06PCL, 5 MC-04SCLxMC-04PCL. Flow rate axis 0 to 0.35 m3/min (ANR), pressure axis 0 to 0.7 MPa {7 kgf/cm2}. |
Interchangeability and size groups
Sockets and plugs can be connected regardless of end configurations.
Safety and application notes
- Note: Fluid will flow out from the plug side when disconnected. Take necessary precaution if the fluid is water.
- Always fix tubes with hose clamps when using hose barb types.
- Before use, please be sure to read the Safety Guide described at the end of this book and the Instruction Sheet that comes with the products.
All technical data on this page is taken from the Nitto Kohki general catalogue Quick Connect Couplings C01en-b, page 23. The complete catalogue is available for download on this page.
