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Light lever pull-down will connect the plug and socket without fail ready to flow liquid or gases.

  • This Cupla complies with diversified applications in liquid or gas transportation.
  • End-face seal structure enables no bumps or hollows on the internal fluid passage, and ensures smooth fluid transportation.
  • “Special lip seal” adopted (except 3/4”, 1” sizes and silicon rubber seal) for light lever action and tight and sure sealing when connected.
  • Connection part dimensions comply with US military specifications MIL-A-A-59326.
  • The variety of body materials, sizes and end configurations has been standardized to comply with wide range of applications.
  • Additional stopper function design will enhance safety (made-to-order product).

Nitto presents lever lock Cupla quick connect couplings. The plug and socket are connected without fail with a light lever pull-down. This makes them prepared to flow liquid or gases. The Cupla is compatible with a range of low-pressure applications in liquid or gas transportation. Fluid transportation is smooth as the internal fluid passage does not have any bumps or hollows due to the end-face seal structure.

The couplings use a “Special lip seal”, except sizes 3/4”, 1” and silicon rubber seal. This results in a light lever action and secure and tight sealing upon connection. The dimensions of connection components are in compliance with US military specifications MIL-A-A-59326. The numerous body materials, sizes and end configurations are all standardized to suit a broad variety of applications. Safety can be further enhanced by a made-to-order design featuring an extra stopper function.

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Applicable Fluids: Water / Heated Oil
Working Pressure: 7 ~ 18 bar / 2 ~ 5 bar
Valve Structure: Straight through
Body Material: Stainless Steel / Plastic / Others
Seal Material: NBR / FKM / SI / EPDM
Size: 3/4″ / 1″ / 1 1/4″ / 1 1/2″ / 2″ / 2 1/2″ / 3″ / 4″







A larger offering is available for the die casting and injection molding marketplace. Includes Multi-Connection configurations as well as 5,000PSI couplers for high pressure applications. Providing flows in excess of conventional market products.

TSP: Valve-less couplers for high flow needs 725 PSI (5MPa) SP-A: 2-Way Valves up to 725 PSI (5MPa) Mold Cupla: High flow couplers designed specifically for die cooling applications

HSP: Higher pressure 2-Way Valves 350: 5,000 PSI (Higher Pressure) F35: 5,000 PSI (Flat Faced, Reduced Spillage)

Multi Cupla: (Multiple Simultaneous Connections) Flow Meter: A great way to monitor your coolant flow rate


Quick connects designed for all the manufacturing fluids – air, water, hydraulic. For all manufacturing, process and industrial sectors.

Pneumatic Couplers

Nitto Kohki has a broad range of pneumatic quick disconnect couplers.  The couplers are available in brass, steel or stainless steel.  A few of the most popular items are listed below.  Please browse the catalog from page 17 ~ 58 for a full view of our product line.

Hi Cupla
Hi Cupla 200 (One-Touch Connection) Hi Ace Cupla (Plastic Body) Full Blow Cupla (High Flow) Lock Cupla 200 (Locking Sleeve)

Nut Cupla (Direct Hose Connection) Rotary Nut Cupla PVR Purge Cupla (Pressure Relief Sleeve) Twist Plug Rotary Plug

NK Cupla Hose NK Cupla Coil Hose Small Cupla Super Cupla Micro Cupla

Purge Line Cupla (Pressure Relief Lever) Line Cupla 200T/L/S Rotary Line Cupla (Rotating Manifold) Multi Cupla (Simultaneous Multiple Connections)

Hydraulic Couplers

Nitto Kohki produces high quality, industrial proven, general purpose quick disconnect couplers. These couplers are perfect for low, medium or high pressure fluid applications.

SP-A: 200~1,000 PSI (Dual Valve) HSP: 2000~3,000 PSI (Dual Valve) TSP: 200~1,000 PSI (No Valve) 350: 5,000 PSI (Dual Valve) 210: 3,000 PSI (Dual Valve)

280: 4,000 PSI (Dual Valve) 450B: 6,400 PSI (Dual Valve) 700R: 10,000 PSI (Dual Valve) Flat Face: 5,000 PSI Minimal Drip (Dual Valve) Hyper HSP: 3,000 PSI Pressure Relief (Dual Valve)

Lever Lock: 70~250 PSI (No Valve)