S Coupler KK Series, Socket (S) Elbow Type With One-Touch Fitting

Caution
- The minimum order quantity varies depending on the selected model. Please check the quotation / order screen for details.
- 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 Elbow Type With One-Touch Fitting specifications

Elbow Type With One-Touch Fitting KK2 external appearance

Elbow Type With One-Touch Fitting KK3, 4, 6 external appearance

Elbow Type With One-Touch Fitting KK2 dimensional drawing

Elbow Type With One-Touch Fitting KK3, 4, 6 dimensional drawing
| Body size | Model | Applicable tube outer diameter | φD1 | φD2 | L1 | L2 When connected | L3 | M | Minimum hole diameter | Effective area mm2 | Weight g | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Urethane tube | Nylon tube | |||||||||||
| M5 | KK2S-23L | φ3.2 | 10.0 | 9.3 | 26.0 | 27.5 | 16.5 | 12.7 | 2.5 | 3.7 | 4.4 | 6.7 |
| KK2S-04L | ø4 | |||||||||||
| KK2S-06L | ø6 | 11.6 | 27.2 | 28.3 | 16.6 | 13.5 | 4.5 | 5.6 | 5.6 | 7.2 | ||
| 1/8 | KK3S-04L | ø4 | 20.2 | 10.4 | 41.7 | 44.2 | 18.0 | 16.0 | 3.0 | 3.7 | 5.3 | 23.2 |
| KK3S-06L | ø6 | 12.8 | 42.9 | 45.4 | 20.0 | 17.0 | 4.5 | 10.1 | 11.4 | 24.0 | ||
| KK3S-08L | ø8 | 15.2 | 43.1 | 45.6 | 23.0 | 18.5 | 6.0 | 15.0 | 16.8 | 25.0 | ||
| KK3S-10L | ø10 | 18.5 | 42.9 | 45.4 | 26.5 | 21.0 | 7.5 | 18.0 | 18.5 | 34.4 | ||
| 1/4 | KK4S-06L | ø6 | 28.0 | 12.8 | 54.3 | 58.0 | 20.0 | 17.0 | 4.5 | 10.1 | 11.4 | 53.5 |
| KK4S-08L | ø8 | 15.2 | 55.5 | 59.2 | 23.0 | 18.5 | 6.0 | 17.5 | 19.8 | 53.1 | ||
| KK4S-10L | ø10 | 18.5 | 54.2 | 57.9 | 26.5 | 21.0 | 7.5 | 24.7 | 27.5 | 54.7 | ||
| KK4S-12L | ø12 | 20.9 | 55.4 | 59.1 | 28.5 | 22.0 | 9.0 | 29.0 | 29.6 | 57.0 | ||
| 1/2 | KK6S-12L | 31.6 | 66.3 | 71.6 | 13.0 | 38.1 | 39.7 | 91.4 | ||||
| KK6S-16L | ø16 | 26.5 | 66.9 | 72.2 | 34.0 | 25.0 | 50.3 | 58.7 | 93.5 | |||
Unit: mm
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.