S Coupler KK Series, Socket (S) Male Thread Type

Caution
- Refer to the catalog for product specs.
- The product shown in the image may be a representative image. Refer to the catalog for product shapes and types.
Product Description
An S coupler / one-touch joint joint with improved plug/socket pull-out strength.
[Features]
· Equipped as standard with a sleeve cover.
· Shock resistance has been improved by changing the lock ring to shock-resistant PBT.
· The loss of effective area is minimized because there is no valve spring to block the flow path.
· The check valve end configuration facilitates a rectifying effect.
· A sealing structure with low leakage.
· Employs a unique connection method.
[Applications]
· Fluids used: air, water.
S Coupler KK Series Male Thread Type specifications

Male Thread Type KK2 external appearance

Male Thread Type KK3, 4, 6 external appearance

Male Thread Type KK2 dimensional drawing

Male Thread Type KK3, 4, 6 dimensional drawing
| Body size | Model | T Pipe/ connection port diameter | H Width across flats | øD | L1 | L2 When connected | *A1 | *A2 When connected | Minimum hole diameter | Effective area mm2 | Weight g |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | KK2S-M5M | M5 × 0.8 | 8 | 10.0 | 24.7 | 26.2 | 21.7 | 23.7 | 2.5 | 3.8 | 6.1 |
| KK2S-01MS | R1/8 | 10 | 24.4 | 25.9 | 22.8 | 4.7 | 5.8 | 9.1 | |||
| 1/8 | KK3S-01MS | R1/8 | 14 | 20.2 | 36.6 | 39.1 | 33.5 | 36.0 | 6.0 | 20.4 | 20.1 |
| KK3S-02MS | R1/4 | 37.0 | 39.5 | 31.5 | 34.0 | 9.0 | 21.1 | 19.2 | |||
| KK3S-03MS | R3/8 | 17 | 37.6 | 40.1 | 32.2 | 34.5 | 29.0 | ||||
| 1/4 | KK4S-01MS | R1/8 | 19 | 28.0 | 49.5 | 53.2 | 46.4 | 50.1 | 6.0 | 22.9 | 47.5 |
| KK4S-02MS | R1/4 | 50.5 | 54.2 | 45.0 | 48.7 | 9.0 | 38.9 | 44.1 | |||
| KK4S-03MS | R3/8 | 48.9 | 52.6 | 43.5 | 47.2 | 11.0 | 40.4 | 50.9 | |||
| KK4S-04MS | R1/2 | 22 | 48.8 | 52.5 | 41.7 | 45.4 | 13.0 | 42.7 | 61.2 | ||
| 1/2 | KK6S-03MS | R3/8 | 24 | 31.6 | 59.1 | 64.4 | 53.7 | 59.0 | 11.0 | 71.7 | 87.9 |
| KK6S-04MS | R1/2 | 59.3 | 64.6 | 52.2 | 57.5 | 13.0 | 82.3 | 90.1 | |||
| KK6S-06MS | R3/4 | 27 | 60.2 | 65.5 | 50.7 | 56.0 | 15.0 | 83.8 | 113.3 |
Units: mm
*Reference dimensions after screwing in R thread.
Common specifications
| Operating fluid | Air, water |
|---|---|
| Operating pressure rangeNote: | KK2: -100 kPa to 1 MPa KK3: -90 kPa to 1 MPa KK4/6: 0 to 1 MPa |
| Guaranteed proof pressure | 1.5 MPa |
| Ambient temperature and working fluid temperature | Air: -5 to 60°C Water: 5 to 40°C (no freezing) |
| Plating, seal | With electroless nickel plating (copper-free and fluorine-free application) and male thread sealant |
Note: Do not use with a leak tester or for vacuum retention because they are not guaranteed for zero leakage.
Common performance
| Plug/socket connection method | One-touch connection |
|---|---|
| Check valve | Socket: check valve built-in (standard) |
| Sleeve lock mechanismNote: | Manual locking type (standard) |
Note: The KK2 series does not include a lock mechanism.
Flow rate characteristics

Air (0 to 1 MPa): KK2

Air (0 to 1 MPa): KK3, 4, 6

Water (0 to 0.4 MPa): KK2

Water (0 to 0.4 MPa): KK3, 4, 6
- Note: Refer to the manufacturer's catalog for specifications other than those above.