Screw-on Type Cupla

Screw Cupla NCF Type
Screws on to the male unified thread easily.
Made up of the nut and body.
The bearing in the Screw Cupla makes rotationof the nut smooth and reduces damage to thethree-terraced-shape lip packing.
• Employing a three-terraced-shape lip packing enables more stable seal
performance opposed to conventional packing and O-rings.
• Withstands a vacuum of up to 1.3 x 10-1Pa (1 x 10-3 mmHg) (when connected)
making it possible to be used in leak test, vacuum suction and refrigerantcharge.
• Select from two standard types of seal materials to be used with fluids for
air conditioner and refrigerator production lines. Many models available tosuit various thread sizes.
• The nut shape is changed for visual recognition of the seal material used in
the Screw Cupla.

Three-terraced-shape lip packing
Hydrogenated nitrile rubber (HNBR) is colored in blue for easy recognition.

Three-terraced-shapelip packing

Specifications
Identification of the seal material by the Appearance of the Nut

Body material

Stainless steelSize

For unified threadWorking pressure

4.5 MPa, 46 kgf/cm2, 45 bar, 653 PSI

Seal material
Working temperature range

Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

CR seal is used.

HNBR seal is used.

Models and Dimensions (WAF : WAF stands for width across flats.)

When considering using the Screw Cupla NCF Type, refer to the external dimensions of the Cuplas below and verify if the Cupla can be connected to the unified external threads without any interference.

SocketWork for connectiontFEBBHLModelExternal threadfor connection

NCF-7U

7/16-20UNF

NCF-10U

5/8-18UNF

NCF-12U

3/4-16UNF(t)NCF-14U

7/8-14UNF

NCF-17U

1 1/16-14UNS

RT2A

1.6

DT

C

Unified thread: Pursuant to JIS B 8607

Model
NCF-7U-2
NCF-7U-3
NCF-10U-2
NCF-10U-3
NCF-12U-2
NCF-12U-3
NCF-14U-2
NCF-14U-3
NCF-17U-2
NCF-17U-3

Dimensions (mm)L

D (WAF)øBH (WAF)

44

Hex. 27 × ø29

4.2

Hex. 1746

Hex. 27 × ø298Hex. 1948

Hex. 27 × ø2910Hex. 2151

Hex. 32 × ø3550

Hex. 35 × ø39

710710Hex. 24
Hex. 29

Unified thread dimensions (mm)TR 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8

øE

øFRBC

øA

T2

5.5

9.2

45˚ to 46˚

3.7

7.6 or more

4.8

7/16-20UNF

813.5

45˚ to 46˚

4.8

9.2 or more

75/8-18UNF

1116

45˚ to 46˚

5.5

11.3 or more

103/4-16UNF

13.5

19

45˚ to 46˚6

13.9 or more

12.5

7/8-14UNF

1824

45˚ to 46˚6

17.4 or more

161 1/16-14UNS

Screw Cupla NCF Type with Plug

NCF Cupla with Plug (With Identification Ring)• Specify the plug type (SP-V, SP-V-GN), the body material and seal material
when ordering.
• The Loctite (medium strength 242) is used as standard for the plug mounting adhesive.
Should you require other adhesive or method such as thread seal tape, please specify.

• When several refrigerants are used on the production line simultaneously,
Screw Cupla with colored rings are available for visual recognition and todistinguish the seal material used.

With 2P-V

Elbow types are also available.

With CR seal

With HNBR seal

With 3P-V
Blue Ring

21* Following types are available on request: Long adapter type, 45 degree elbow type, types with round knurled nut, small outer diameter nut or O-ring seal.

Red Ring