One-Touch Fitting KQ2 Series Hexagon Socket Head Male Connector KQ2S (Sealant / No Sealant)

Brand :
SMC
Caution
- The minimum order quantity varies depending on the selected model. Please check the quotation / order screen for details.
- See the catalog for details on materials and specifications.
- Product images may be representative images. Refer to the catalog for details.
Product Description
The KQ2S Hexagon Socket Head Half Union (Sealant) is a one-touch fitting from SMC
[Features]
· Improved tube insertion/removal.
· Compact and light weight.
[Applications]
· A male connector with a hexagon socket on the body that can be used for tightening with a hex wrench. Ideal for use in confined spaces.
[See here for catalog]
· Applicable tube outer diameter (metric), Connection thread [R], Release button: oval (pp. 10) circle (pp. 107)
· Applicable tube outer diameter (inches), Connection thread [NPT], Release button: oval (pp. 34) circle (pp. 139)
Hexagon Socket Head Male Connector KQ2S (Sealant) Details Example

Hexagon Socket Head Male Connector KQ2S (Sealant) KQ2S03/05/07/09/11/13 Series product image example
Hexagon Socket Head Male Connector KQ2S (Sealant) Specifications Example
| Usable fluids | Air, water Note 1: | |
|---|---|---|
| Operating pressure range Note 2: | -100 kPa to 1 MPa | |
| Guaranteed proof pressure (at 23°C) | 3 MPa | |
| Ambient temperature and fluid temperature | -5 to 60°C, For water: 0 to 40°C (no freezing) | |
| Thread | Mounting section | ISO 16030 (parallel pipe thread) |
| Nut section | JIS B0205 (metric fine thread) | |
| Thread part sealant | Seal ring | |
- Note 1: The surge pressure must be under the maximum operating pressure.
- * Note 2: Do not use the fittings with a leak tester or for vacuum retention because they are not guaranteed for zero leakage.
Main Component Materials
| Body | C3604, PBT |
|---|---|
| Stud | C3604 (thread part) |
| Chuck | SUS304 |
| Guide | SUS304 |
| Release button | POM |
| Seal, O-ring, seal ring | NBR |
Hexagon Socket Head Male Connector KQ2S (Sealant) Dimensions Example
KQ2S03/05/07/09/11/13 Series
(Units: mm)

KQ2S03/05/07/09/11/13 Series dimensional drawing
| Applicable tube outer diameter Inches | Connection thread NPT | Model | H (width across flats) | øD Note: | L1 | L2 | A * | M | Effective area (mm2) | Minimum hole diameter | Weight g | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nylon | Urethane | |||||||||||
| ø5/32 | 1/16 | KQ2S03-33□S | 2.78 | 8 | 19.8 | 18.8 | 15.7 | 13.3 | 4.1 | 3.6 | 2.8 | 4.5 |
| 1/8 | KQ2S03-34□S | 2.78 | 10.3 | 17.3 | 16.3 | 14.1 | 13.3 | 4.1 | 3.6 | 2.8 | 6 | |
| ø3/16 | 1/8 | KQ2S05-34□S | 3.57 | 11 | 19.8 | 18.8 | 16.6 | 13.3 | 7.8 | 6.5 | 3.6 | 7.5 |
| ø1/4 | 1/16 | KQ2S07-33□S | 3.57 | 10.3 | 20.9 | 18.8 | 16.8 | 13.3 | 8.4 | 8.4 | 3.6 | 6.3 |
| 1/8 | KQ2S07-34□S | 4.76 | 10.3 | 19.8 | 18.8 | 16.6 | 13.3 | 13.5 | 11.5 | 4.8 | 7.4 | |
| 1/4 | KQ2S07-35□S | 4.76 | 13.8 | 19.8 | 18.8 | 15.4 | 13.3 | 13.5 | 11.5 | 4.8 | 13.2 | |
| 3/8 | KQ2S07-36□S | 4.76 | 17 | 20.8 | 19.8 | 16.1 | 13.3 | 13.5 | 11.5 | 4.8 | 24 | |
| ø5/16 | 1/8 | KQ2S09-34□S | 5.56 | 13 | 22.3 | 19.7 | 19.1 | 14.2 | 17.2 | 16.2 | 5.6 | 9.7 |
| 1/4 | KQ2S09-35□S | 6.35 | 14 | 21.2 | 20.1 | 16.8 | 14.2 | 23.3 | 16.2 | 6.4 | 12.6 | |
| 3/8 | KQ2S09-36□S | 6.35 | 17.5 | 20.7 | 19.7 | 16 | 14.2 | 23.3 | 16.2 | 6.4 | 21 | |
| ø3/8 | 1/8 | KQ2S11-34□S | 5.56 | 15.1 | 23.7 | 21.1 | 20.5 | 15.6 | 22.7 | 22.7 | 5.6 | 12.1 |
| 1/4 | KQ2S11-35□S | 6.35 | 15.1 | 24.4 | 21.1 | 20 | 15.6 | 29.6 | 29.1 | 6.4 | 15.2 | |
| 3/8 | KQ2S11-36□S | 6.35 | 18 | 22.1 | 21.1 | 17.4 | 15.6 | 29.6 | 29.1 | 6.4 | 22.7 | |
| 1/2 | KQ2S11-37□S | 6.35 | 21.3 | 22.1 | 21.1 | 15.7 | 15.6 | 29.6 | 29.1 | 6.4 | 40.6 | |
| ø1/2 | 1/4 | KQ2S13-35□S | 8 | 19 | 28.5 | 22.5 | 24.1 | 17 | 48 | 48 | 8.1 | 18.9 |
| 3/8 | KQ2S13-36□S | 9.53 | 19 | 26.3 | 22.5 | 21.6 | 17 | 66 | 51.7 | 9.6 | 20.7 | |
| 1/2 | KQ2S13-37□S | 9.53 | 22 | 23.5 | 22.5 | 17.1 | 17 | 66 | 51.7 | 9.6 | 33.3 | |
- *Note: øD is the maximum diameter.
- * Reference dimensions after screwing-in NPT thread.
- * □: A (Brass), N (Brass + electroless nickel plating)