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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)
Part Number
Configured Part Number is shown.

Hexagon Socket Head Male Connector KQ2S (Sealant) KQ2S03/05/07/09/11/13 Series product image 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 | |
| Body | C3604, PBT |
|---|---|
| Stud | C3604 (thread part) |
| Chuck | SUS304 |
| Guide | SUS304 |
| Release button | POM |
| Seal, O-ring, seal ring | NBR |
(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 | |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Body Material | Thread Material | Application | Applicable Tube O.D.1 (φ) | Types of connection | Connection screw | Specifications | Release button shape | Release button color | Custom-made specifications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MYR 19.10 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 10 | R | 1/2 | With sealing agent | Perfect circle | Light Gray | N/A | ||
- | 5 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 10 | R | 1/2 | With sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 19.93 | 5 Piece(s) | 5 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 10 | R | 1/2 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 21.30 | 5 Piece(s) | 43 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 10 | R | 1/2 | With sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 25.15 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 1/8 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 18.50 | 10 Piece(s) | 43 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 1/8 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 27.38 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 1/8 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 22.63 | 10 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 1/8 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 26.48 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 1/4 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 19.50 | 10 Piece(s) | 43 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 1/4 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 28.68 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 1/4 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 24.14 | 10 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 1/4 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 26.48 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 3/8 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 19.50 | 10 Piece(s) | 43 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 3/8 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 28.68 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 3/8 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 30.47 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 3/8 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 28.68 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 1/2 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 25.07 | 10 Piece(s) | 13 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 3/8 | NPT | 1/2 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 31.77 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 1/2 | Without sealing agent | Perfect circle | Orange | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 3/8 | NPT | 1/2 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 17.10 | 5 Piece(s) | 5 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/4 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/4 | Without sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 18.30 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/4 | With sealing agent | Perfect circle | Light Gray | N/A | ||
- | 5 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/4 | With sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 21.38 | 5 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 12 | R | 1/4 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 19.80 | 5 Piece(s) | 43 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 12 | R | 1/4 | With sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 17.60 | 5 Piece(s) | 43 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 3/8 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 3/8 | Without sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 18.80 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 3/8 | With sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 21.38 | 5 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 3/8 | With sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 19.10 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 12 | R | 3/8 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 20.10 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 12 | R | 3/8 | With sealing agent | Perfect circle | Light Gray | N/A | ||
- | 5 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/2 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/2 | Without sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 20.50 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/2 | With sealing agent | Perfect circle | Light Gray | N/A | ||
- | 5 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 12 | R | 1/2 | With sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 23.64 | 5 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 12 | R | 1/2 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 22.67 | 5 Piece(s) | 5 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 12 | R | 1/2 | With sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 30.92 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 1/2 | NPT | 1/4 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 25.75 | 10 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 1/2 | NPT | 1/4 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 20.00 | 10 Piece(s) | 43 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 1/2 | NPT | 1/4 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 24.27 | 10 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 1/2 | NPT | 1/4 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 24.43 | 10 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 1/2 | NPT | 3/8 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 25.82 | 10 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 1/2 | NPT | 3/8 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 34.00 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 1/2 | NPT | 3/8 | Without sealing agent | Perfect circle | Orange | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 1/2 | NPT | 3/8 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 31.33 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 1/2 | NPT | 1/2 | Without sealing agent | Perfect circle | Orange | N/A | ||
MYR 32.67 | 1 Piece(s) | 21 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 1/2 | NPT | 1/2 | With sealing agent | Perfect circle | Orange | N/A | ||
MYR 34.42 | 10 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 1/2 | NPT | 1/2 | Without sealing agent | Perfect circle | Orange | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 1/2 | NPT | 1/2 | With sealing agent | Perfect circle | Orange | N/A | ||
- | 5 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/4 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/4 | Without sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 20.50 | 5 Piece(s) | 43 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/4 | With sealing agent | Perfect circle | Light Gray | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/4 | With sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 30.02 | 5 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 16 | R | 1/4 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 22.70 | 5 Piece(s) | 43 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 16 | R | 1/4 | With sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 26.38 | 5 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 3/8 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 3/8 | Without sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 24.00 | 5 Piece(s) | 43 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 3/8 | With sealing agent | Perfect circle | Light Gray | N/A | ||
- | 5 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 3/8 | With sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 30.00 | 5 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 16 | R | 3/8 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 38.83 | 1 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 16 | R | 3/8 | With sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 25.00 | 5 Piece(s) | 10 Day(s) or more | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/2 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
- | 10 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/2 | Without sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 23.30 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/2 | With sealing agent | Perfect circle | Light Gray | N/A | ||
- | 5 Piece(s) | Quote | [Brass] PBT + Brass | [Standard (Brass)] Brass | Standard/Mini | 16 | R | 1/2 | With sealing agent | Perfect circle | White | Lubricant: white petroleum jelly, release bushing color change | ||
MYR 36.18 | 5 Piece(s) | 21 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 16 | R | 1/2 | Without sealing agent | Perfect circle | Light Gray | N/A | ||
MYR 26.90 | 5 Piece(s) | 3 Day(s) | [Brass] PBT + Brass (Electroless nickel plating) | [Standard (Brass)] Brass (Electroless nickel plating) | Standard/Mini | 16 | R | 1/2 | With sealing agent | Perfect circle | Light Gray | N/A |
Loading...
| Fitting Type | Screw Mount Direction | Applicable Fluid | Water / Air | Screw Mounting, Direction | With hex socket and straight |
|---|---|---|---|---|---|
| Types | Single-Action / Screw | Packing, Material of O-Ring | NBR | Operating Temperature(°C) | -5::60 |
| Number of Connection Tubes(piece) | 1 | Color | White |
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