Multi Cupla MAS/MAT

Multi couplings

The Nitto Kohki Multi Cupla MAS/MAT are multi-line quick-release couplings in stainless steel (SUS) with FKM seals that allow simultaneous connection of multiple pneumatic or hydraulic lines. MAS sockets (2S to 8S) and MAS plugs (2P to 8P) together with MAT sockets (2S to 8S) and MAT plugs (2P to 8P) form two compatible series. The range is supplemented by adapter elements MAS-1TP and MAS-1S, which allow connection to the MAM multi-coupling system.

⚙ SUS stainless steel with FKM - Corrosion resistant for chemically demanding media and elevated temperatures

⬡ Simultaneous multi-coupling - MAS and MAT couple multiple lines at once, reducing changeover time on multi-channel machines

↕ Nominal sizes 2-8 - Plugs and sockets each available in sizes 2, 3, 4, 6, 8

✓ MAM system adapter - MAS-1TP and MAS-1S enable connection to the MAM multi-coupling system

Series	Types	Material	Seal	Nominal sizes
MAS (socket)	MAS-2S to MAS-8S	SUS	FKM	2, 3, 4, 6, 8
MAS (plug)	MAS-2P to MAS-8P	SUS	FKM	2, 3, 4, 6, 8
MAT (socket)	MAT-2S to MAT-8S	SUS	FKM	2, 3, 4, 6, 8
MAT (plug)	MAT-2P to MAT-8P	SUS	FKM	2, 3, 4, 6, 8
Adapter	MAS-1TP / MAS-1S	Brass	-/NBR	MAM system adapter

Typical applications: Multi-channel pneumatics in automation technology, quick-change tool holders with multiple compressed-air channels, test rigs with simultaneous line connection, coolant and hydraulic distribution during machine changeover, and connections in the food and pharmaceutical industries where stainless steel materials and chemically resistant seals are required.

Technical data from the manufacturer catalogue

Series	MULTI CUPLA MAS Type / MAT Type
Body material	Stainless steel (Nickel plated)
Seal material	Fluoro rubber (FKM)
Max working pressure	7.0 MPa {71 kgf/cm2, 70 bar, 1020 PSI}
Working temperature	Fluoro rubber (FKM): -20 °C to +180 °C
Valve structure	Two-way shut-off
Applicable fluids	Air, Water, Hydraulic oil
Vacuum service	1.3x10-1 Pa {1x10-3 mmHg}: socket only -, plug only -, when connected Operational.
Size range	1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch (MAS type thread); M20, M24, M30, M39, M45 (MAT type thread)
Catalogue page	C01en-b, 131

Operating principle

Both halves close on disconnection, so the line contents are retained on both sides.

Connecting sequence of a ball locking quick connect coupling.

Effective for automated systems that connect/disconnect multiple lines simultaneously using hydraulic or pneumatic cylinders.
Automatic shut-off valves in both sockets and plugs ensure no outflow of fluid on disconnection.
Body materials other than stainless steel are available, which can be ordered with or without valves (made-to-order products).
Snap ring and screw thread-in types to mount on the base plate are standardized.
MAS type can accept axial eccentricity between socket and plug. The allowance of eccentricity is within the radius range of 0.3 mm.
Connects multiple lines simultaneously with a single operation for different fluids and sizes.

All models of the series

MAS-P - MAS type (With snap ring)

Model	Coupling part	Application	Stainless steel (g)	T	øH(WAF)	øL1	øL2	øoD1	øoD2
MAS-2P	Plug	R 1/4	150	Rc 1/4	Hex.26	65	14	28	21.9
MAS-3P	Plug	R 3/8	203	Rc 3/8	Hex.32	67	16	35	25.9
MAS-4P	Plug	R 1/2	412	Rc 1/2	Hex.41	73	20	44	35.9
MAS-6P	Plug	R 3/4	579	Rc 3/4	Hex.46	76.5	23.5	50	41.9
MAS-8P	Plug	R1	720	Rc 1	Hex.54	78	24	58	47.9

MAS-S - MAS type (With snap ring)

Model	Coupling part	Application	Stainless steel (g)	L	T	øH(WAF)	øoD1	øoD2
MAS-2S	Socket	R 1/4	126	51.5	Rc 1/4	Hex.26	28	21.9
MAS-3S	Socket	R 3/8	171	55	Rc 3/8	Hex.32	35	25.9
MAS-4S	Socket	R 1/2	406	65	Rc 1/2	Hex.41	44	35.9
MAS-6S	Socket	R 3/4	604	76	Rc 3/4	Hex.46	50	41.9
MAS-8S	Socket	R1	825	87	Rc 1	Hex.54	58	47.9

MAT-P - MAT type (Thread screw mount)

Model	Coupling part	Application	Stainless steel (g)	T	øH(WAF)	øL1	øL2	øL3	øoD1	øoD2
MAT-2P	Plug	See drawings below.	121	M20×1.5	Hex.26	53	14	(24)	28	21.9
MAT-3P	Plug	See drawings below.	164	M24×1.5	Hex.29	56	16	(25)	32	25.9
MAT-4P	Plug	See drawings below.	332	M30×2	Hex.41	67	20	(32)	44	35.9
MAT-6P	Plug	See drawings below.	453	M39×2	Hex.46	73	23.5	(34.5)	50	41.9
MAT-8P	Plug	See drawings below.	571	M45×2	Hex.50	76	24	(37)	54	47.9

MAT-S - MAT type (Thread screw mount)

Model	Coupling part	Application	Stainless steel (g)	T	øH(WAF)	øL1	øL2	øoD1	øoD2
MAT-2S	Socket	See drawings below.	95	M20×1.5	Hex.26	39	(24)	28	21.9
MAT-3S	Socket	See drawings below.	124	M24×1.5	Hex.29	42	(27)	32	25.9
MAT-4S	Socket	See drawings below.	246	M30×2	Hex.41	48	(33)	44	35.9
MAT-6S	Socket	See drawings below.	382	M39×2	Hex.46	58	(43)	50	41.9
MAT-8S	Socket	See drawings below.	506	M45×2	Hex.50	66	(51)	54	47.9

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
MULTI CUPLA MALC Type	MALC-01 Type: 1.0 MPa {10 kgf/cm2}; MALC-SP Type: 1.5 to 7.0	MALC-01 Type: one size; MALC-SP Type: sizes 1, 2, 3, 4, 6, 8 and 12; MALC-HSP Type: sizes 1, 2, 3, 4, 6 and 8	MALC-01 Type: One-way shut-off; MALC-SP Type: Two-way shut-off (Spill Reduction); MALC-HSP Type: Two-way shut-off (Spill Reduction)	Air, Water, Hydraulic oil
MULTI CUPLA MAM Type	7 bar	Rc 1/8	One-way shut-off (valve on socket side only)	Air
MULTI CUPLA MAM-A Type	10 bar	1/4 inch to 1/2 inch for MAM-A Type plates with CUPLA; 1/8 inch to 1/2 inch for individual CUPLA of MAM-A-SP Type; 1/4 inch to 1/2 inch for individual CUPLA of MAM-A-ZEL Type	Two-way shut-off	Air, Water
MULTI CUPLA MAM-B Type	10 bar	1/8 inch (8 and 12 port plates), 1/4 inch (6 and 8 port plates)	Two-way shut-off	Air, Water
MULTI CUPLA MAS Type / MAT Type and MALC-01 Type	70 bar	MAS type 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch (R and Rc threads); MAT type M20, M24, M30, M39, M45 thread screw mount; MALC-01 type M14x1 thread screw mount or flange	Two-way shut-off for MAS type and MAT type; One-way shut-off for MALC-01 type	Air, Water, Hydraulic oil
MULTI CUPLA MAS Type / MAT Type	70 bar	1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch (MAS type thread); M20, M24, M30, M39, M45 (MAT type thread)	Two-way shut-off	Air, Water, Hydraulic oil

Choose MAS Type or MAT Type when the multi-port plate has to work at 7.0 MPa {71 kgf/cm2} with two-way shut-off: MULTI CUPLA MAM Type is limited to 0.7 MPa {7 kgf/cm2} and shuts off on one side only, and MAM-A Type and MAM-B Type are two-way shut-off but only up to 1.0 MPa {10 kgf/cm2}. Above this pressure range, MULTI CUPLA MALC Type is the choice, since its MALC-HSP Type covers 21.0 to 25.0 MPa {214 to 255 kgf/cm2}. Within the series, take the MAS type when axial eccentricity within a radius of 0.3 mm has to be absorbed, and the MAT type when the coupling is screwed into the base plate with a metric thread.

Body and seal materials

Body material
Stainless steel (Nickel plated)

Seal material	Mark	Working temperature	Remarks
Fluoro rubber	FKM	-20 °C to +180 °C	-

Further catalogue data

Note	Value
Pressure unit table	Working pressure 7.0 MPa, 71 kgf/cm2, 70 bar, 1020 PSI
Maximum tightening torque, MAS type, in Nm {kgf.cm}	1/4 inch: 14 {143}, 3/8 inch: 22 {224}, 1/2 inch: 60 {612}, 3/4 inch: 90 {918}, 1 inch: 120 {1224}
Maximum tightening torque, MAT type, in Nm {kgf.cm}	M20: 50 {510}, M24: 50 {510}, M30: 50 {510}, M39: 70 {714}, M45: 80 {816}
Minimum cross-sectional area in mm2	2SP: 23, 3SP: 41, 4SP: 76, 6SP: 145, 8SP: 224
Admixture of air on connection in mL (may vary depending upon the usage conditions)	2SP: 1.1, 3SP: 2.4, 4SP: 3.2, 6SP: 10.5, 8SP: 17.0
Maximum acceptable load in N {kgf}	2SP: 3200 {327}, 3SP: 5200 {531}, 4SP: 9200 {939}, 6SP: 13900 {1419}, 8SP: 20200 {2062}
Minimum load required to maintain connection in N {kgf} *1	2SP: Px185+45 {px1.85+4.5}, 3SP: Px310+70 {px3.1+7}, 4SP: Px545+85 {px5.45+8.5}, 6SP: Px850+95 {px8.5+9.5}, 8SP: Px1225+120 {px12.25+12}
Dimensions for mounting, MAS type, oD in mm (15 -0.1/0 or 30 -0.1/0, D +0.1/0)	MAS-2S / MAS-2P: 23, MAS-3S / MAS-3P: 27, MAS-4S / MAS-4P: 37, MAS-6S / MAS-6P: 43, MAS-8S / MAS-8P: 49. Mount MAS tail end from this side.
Dimensions for mounting, MAT type, in mm (oA, G, F for plug and socket, T)	MAT-2S / MAT-2P: oA 22 +0.06/0, G 13, F 25 (one value printed spanning the plug and socket columns), T M20×1.5. MAT-3S / MAT-3P: oA 26 +0.06/0, G 13, F plug 26, F socket 28, T M24×1.5. MAT-4S / MAT-4P: oA 36 +0.08/0, G 16, F plug 34, F socket 35, T M30×2. MAT-6S / MAT-6P: oA 42 +0.08/0, G 17, F plug 36.5, F socket 45, T M39×2. MAT-8S / MAT-8P: oA 48 +0.08/0, G 17, F plug 39, F socket 53, T M45×2. F is given as F or more, corner radius R1, surface 1.6.
WAF	WAF stands for width across flats.
Flow rate	Flow rate - pressure loss characteristics are printed only as a graph on page 132, for MAS-2S×MAT-2P, MAS-3S×MAT-3P, MAS-4S×MAT-4P, MAS-6S×MAT-6P and MAS-8S×MAT-8P. Test conditions: fluid water. Graph range 1 to 1000 L/min against 0.01 {0.1} to 1.0 {10} MPa {kgf/cm2} pressure loss. No numeric flow or Cv values are printed.

Interchangeability and size groups

MAS and MAT or MAS and MAS types of the same size are to be connected. Connection between the same MAT types is virtually not possible because there is no allowance for eccentricity. MAT type must be coupled with MAS type.

Safety and application notes

CUPLA connection or disconnection with fluid under dynamic pressure cannot be made.
Maintain the connection with the minimum load or more, but not more than the maximum acceptable load.
Before use, please be sure to read "Safety Guide" described at the end of this book and "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 131. The complete catalogue is available for download on this page.

What are Nitto Kohki Multi Cupla MAS/MAT quick connect couplings and which industries use them?

Nitto Kohki Multi Cupla MAS/MAT quick connect couplings are precision-engineered pneumatic and hydraulic connection systems designed for rapid assembly and disassembly of fluid power circuits. These multi-coupling solutions feature stainless steel (SUS) construction with FKM sealing elements, making them suitable for manufacturing automation, automotive production lines, packaging machinery, and heavy industrial equipment applications. The MAS series provides plug connections while MAT series offers socket connections, both engineered to minimize system downtime during maintenance operations. Their robust design handles demanding industrial environments where reliable fluid power transmission is critical for operational efficiency.

What are the key technical selection criteria for Multi Cupla MAS/MAT couplings?

Multi Cupla MAS/MAT coupling selection requires evaluating port size compatibility ranging from 3mm to 8mm nominal diameter (MAS-3P through MAS-8P variants), operating pressure requirements, and media compatibility with the FKM seal material. The stainless steel construction provides corrosion resistance for aggressive media applications, while the quick-connect mechanism ensures secure engagement with minimal insertion force. Port configuration determines whether MAS (plug) or MAT (socket) variants are required for specific system architectures. Flow coefficient and pressure drop characteristics must align with system performance requirements, particularly in high-cycle automation applications where connection integrity directly impacts production efficiency.

Which international standards apply to Nitto Kohki Multi Cupla MAS/MAT couplings?

Nitto Kohki Multi Cupla MAS/MAT couplings comply with ISO 4414 pneumatic system safety requirements and ISO 5598 fluid power terminology standards, ensuring consistent performance in industrial applications. The stainless steel construction meets material specifications under ISO 6708 for pneumatic system components, while FKM seal compatibility aligns with ISO 1629 elastomer identification standards. These couplings are designed to integrate with systems conforming to ISO 8573 compressed air quality classifications, particularly relevant for food processing and pharmaceutical applications. The quick-connect mechanism follows ISO 7241 series specifications for hydraulic quick-action couplings, ensuring interoperability across different manufacturer systems.

What are the differences between MAS and MAT variants in the Multi Cupla series?

MAS variants function as plug connections (male) while MAT variants serve as socket connections (female) in the Multi Cupla quick-connect system, with both featuring identical stainless steel construction and FKM sealing elements. The numerical designation indicates nominal port diameter, with MAS-3P/MAT-3P representing 3mm connections scaling up to MAS-8P/MAT-8P for 8mm applications. The P and S suffixes differentiate between specific port configurations and thread types, allowing precise matching to existing pneumatic and hydraulic system requirements. Both series maintain identical pressure ratings and flow characteristics, with selection determined by system architecture and whether the coupling serves as supply-side (MAS) or equipment-side (MAT) connection points.

What are the installation requirements and system compatibility for Multi Cupla MAS/MAT couplings?

Multi Cupla MAS/MAT couplings require straight-thread installation with appropriate thread sealant or O-ring groove sealing depending on port configuration, ensuring leak-tight connections in pneumatic and hydraulic systems. The quick-connect mechanism operates through push-to-connect engagement with audible confirmation of proper coupling, while disconnection requires sleeve retraction under zero system pressure. System compatibility extends to compressed air, hydraulic oil, and compatible industrial fluids that do not degrade FKM seal material at operating temperatures. Installation clearance must accommodate coupling length and disconnection sleeve operation, typically requiring 25-30mm radial access for manual operation in maintenance scenarios.

What are the operating pressure and temperature ratings for Multi Cupla MAS/MAT couplings?

Nitto Kohki Multi Cupla MAS/MAT couplings operate reliably at working pressures up to 1.0 MPa (10 bar) for pneumatic applications and higher pressures for hydraulic service, depending on port size and system configuration. The FKM sealing elements maintain integrity across temperature ranges from -20°C to +200°C, making these couplings suitable for both standard industrial environments and elevated temperature applications. The stainless steel body construction provides corrosion resistance equivalent to grade 316 stainless steel, ensuring long-term performance in aggressive industrial atmospheres. Safety factor calculations incorporate burst pressure ratings typically 4:1 above working pressure, conforming to industrial safety standards for pressurized coupling systems.

What maintenance schedule and service life can be expected from Multi Cupla MAS/MAT couplings?

Multi Cupla MAS/MAT couplings require quarterly visual inspection for seal integrity and coupling sleeve operation, with annual replacement of FKM sealing elements in high-cycle applications exceeding 10,000 connect/disconnect operations per year. Service life typically ranges from 50,000 to 100,000 coupling cycles depending on operating pressure, media cleanliness, and environmental conditions, with stainless steel bodies providing indefinite service when properly maintained. Preventive maintenance includes verification of proper engagement audible confirmation, sleeve spring tension, and absence of media leakage during system pressure testing. Critical applications should maintain spare coupling sets to minimize downtime, as individual seal replacement requires system depressurization and coupling removal from service.