One-touch fitting KQ2 series Half union KQ2H (gasket seal)

Caution
- The minimum order quantity varies depending on the selected model. Please check the quotation / order screen for details.
- Some of the items are scheduled to be discontinued as of end of March in 2023. The manufacturer keep the items produced but they are not available with Misumi.
There are not the replacement items and the plan to resumption of sale. Please check the quotation and 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 Male Connector KQ2H (Gasket Seal) is a one-touch fitting from SMC.
[Features]
· Improved tube insertion/removal.
· Compact and light weight.
[Applications]
· Typically used together with a male elbow. However, where it differs is that it is used to prevent interference between fittings by allowing for multi-level piping.
[See here for catalog]
· Applicable tube outer diameter (metric), Connection thread [M], Release button: oval (pp. 9) / circle (pp. 105)
· Applicable tube outer diameter (inches), Connection thread [UNF], Release button: oval (pp. 33) circle (pp. 137)
· Applicable tube outer diameter (inches), Connection thread [M], Release button: oval (pp. 52) / circle (pp. 160)
· Applicable tube outer diameter (metric), Connection thread [Uni], Release button: oval (pp. 90) / circle (pp.204)
· Applicable tube outer diameter (inches), Connection thread [Uni], Release button: oval (pp. 98) / circle (pp. 212)
Male Connector KQ2H (Gasket Seal) Details Example

Male Connector KQ2H (Gasket Seal) KQ2H04-U/KQ2H06-U/KQ2H08-U/KQ2H10-U/KQ2H12-U/KQ2H16-U Series product image
Male Connector KQ2H (Gasket Seal) Specification 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 |
Male Connector KQ2H (Gasket Seal) Dimensions Example
(Units: mm)

KQ2H04-U/KQ2H06-U /KQ2H08-U/KQ2H10-U/KQ2H12-U/KQ2H16-U Series dimensional drawing
| Applicable tube outer diameter (mm) | Connection thread Uni | Model | H (width across flats) | øD | L | A * | M | Effective area (mm2) | Minimum hole diameter | Weight g | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nylon | Urethane | ||||||||||
| ø4 | 1/8 | KQ2H04-U01□ | 10 | 7.7 | 15.9 | 11.1 | 13.3 | 4.8 | 3.4 | 3 | 6.6 |
| 1/4 | KQ2H04-U02□ | 14 | 7.7 | 15.3 | 8.9 | 13.3 | 4.8 | 3.4 | 3 | 12.7 | |
| ø6 | 1/8 | KQ2H06-U01□ | 12 | 9.7 | 16.7 | 11.9 | 13.3 | 13.1 | 10.4 | 4.5 | 6.2 |
| 1/4 | KQ2H06-U02□ | 14 | 9.7 | 17 | 10.6 | 13.3 | 13.1 | 10.4 | 4.5 | 12.8 | |
| 3/8 | KQ2H06-U03□ | 17 | 9.7 | 14.9 | 8.5 | 13.3 | 13.1 | 10.4 | 4.5 | 18.1 | |
| ø8 | 1/8 | KQ2H08-U01□ | 14 | 13 | 20.6 | 15.8 | 14.2 | 26.1 | 18 | 6 | 7 |
| 1/4 | KQ2H08-U02□ | 14 | 13 | 18.5 | 12.1 | 14.2 | 26.1 | 18 | 6 | 10.1 | |
| 3/8 | KQ2H08-U03□ | 17 | 13 | 14.9 | 8.5 | 14.2 | 26.1 | 18 | 6 | 15 | |
| ø10 | 1/8 | KQ2H10-U01□ | 17 | 15.6 | 22.4 | 17.6 | 15.6 | 26.1 | 18 | 6 | 13.9 |
| 1/4 | KQ2H10-U02□ | 17 | 15.6 | 23.7 | 17.3 | 15.6 | 41.5 | 29.5 | 7.5 | 17.6 | |
| 3/8 | KQ2H10-U03□ | 17 | 15.6 | 19.5 | 13.1 | 15.6 | 41.5 | 29.5 | 7.5 | 15.6 | |
| 1/2 | KQ2H10-U04□ | 22 | 15.6 | 17 | 8.4 | 15.6 | 41.5 | 29.5 | 7.5 | 29.5 | |
| ø12 | 1/4 | KQ2H12-U02□ | 19 | 18.2 | 24.8 | 18.4 | 17 | 58.3 | 46.1 | 9 | 13.8 |
| 3/8 | KQ2H12-U03□ | 19 | 18.2 | 21.8 | 15.4 | 17 | 58.3 | 46.1 | 9 | 17.9 | |
| 1/2 | KQ2H12-U04□ | 22 | 18.2 | 17.7 | 9.1 | 17 | 58.3 | 46.1 | 9 | 25.4 | |
| ø16 | 3/8 | KQ2H16-U03□ | 24 | 23.6 | 29.2 | 22.8 | 20.6 | 81 | 67 | 11 | 33.9 |
| 1/2 | KQ2H16-U04□ | 24 | 23.6 | 26.8 | 18.2 | 20.6 | 113 | 67 | 13 | 31.5 | |
□: A (Brass), N (Brass + electroless nickel plating)
- *Reference dimensions after screwing-in Uni thread