Technical Description: The 21 KA series is a small, single hand operated quick connect coupling with high air flow. This series has excellent capabilities wherever space plays a major role. The 21 series provides an excellent solution for the connecting of different mediums with the inherent danger of making the wrong connection. Four standard codes with matching colors for the coupling and the respective plugs make sure there is no mix-up of the mediums when connecting. Double shut-off and straight through couplings are available on request.
Applications: Laboratories, gas providing, learning systems, filling systems, breathing air, chemistry, just to avoid a mix of various mediums. Nominal Plug Bore: .20".
Advantages: A quality coupling with small dimensions. Single handed operation, high flow rate for its size. Multiple connection options. Cannot be interconnected with the standard 21 series.
Working Pressure: 500 psi, maximum static working pressure with safety factor of 4 to1.
Working Temperature:* -4°F up to +210°F (Buna N) depending on the media.
BSP male and female threads are also available on request. Chart - Air | Chart - Water | | |
Coupling | Con. A | Hex | L | D | L1 | L2 | Hex1 | B | G | Colour |
| 1/8" NPT | .55 | 1.92 | .63 | .35 | | | | | green | | | | | | | | | | green | 1/8" NPT | .55 | 1.92 | .63 | .35 | | | | | brown | | | | | | | | | | brown | 1/8" NPT | .55 | 1.92 | .63 | .35 | | | | | blue | | | | | | | | | | blue | 1/8" NPT | .55 | 1.92 | .63 | .35 | | | | | red | | | | | | | | | | red | 1/4" NPT | .55 | 1.96 | .63 | .47 | | | | | green | | | | | | | | | | green | 1/4" NPT | .55 | 1.96 | .63 | .47 | | | | | brown | | | | | | | | | | brown | 1/4" NPT | .55 | 1.96 | .63 | .47 | | | | | blue | | | | | | | | | | blue | 1/4" NPT | .55 | 1.96 | .63 | .47 | | | | | red | | | | | | | | | | red | | | | | | | | | | | |
| 1/8" NPSF | .55 | 1.98 | .63 | .39 | | | | | green | | | | | | | | | | green | 1/8" NPSF | .55 | 1.98 | .63 | .39 | | | | | brown | | | | | | | | | | brown | 1/8" NPSF | .55 | 1.98 | .63 | .39 | | | | | blue | | | | | | | | | | blue | 1/8" NPSF | .55 | 1.98 | .63 | .39 | | | | | red | | | | | | | | | | red | 1/4" NPSF | .66 | 2.16 | .63 | .51 | | | | | green | | | | | | | | | | green | 1/4" NPSF | .66 | 2.16 | .63 | .51 | | | | | brown | | | | | | | | | | brown | 1/4" NPSF | .66 | 2.16 | .63 | .51 | | | | | blue | | | | | | | | | | blue | 1/4" NPSF | .66 | 2.16 | .63 | .51 | | | | | red | | | | | | | | | | red | | | | | | | | | | | |
| 5/32" | .55 | 2.71 | .63 | .66 | | | | | green | | | | | | | | | | green | 5/32" | .55 | 2.71 | .63 | .66 | | | | | brown | | | | | | | | | | brown | 5/32" | .55 | 2.71 | .63 | .66 | | | | | blue | | | | | | | | | | blue | 5/32" | .55 | 2.71 | .63 | .66 | | | | | red | | | | | | | | | | red | 1/4" | .55 | 2.71 | .63 | .66 | | | | | green | | | | | | | | | | green | 1/4" | .55 | 2.71 | .63 | .66 | | | | | brown | | | | | | | | | | brown | 1/4" | .55 | 2.71 | .63 | .66 | | | | | blue | | | | | | | | | | blue | 1/4" | .55 | 2.71 | .63 | .66 | | | | | red | | | | | | | | | | red | 5/16" | .55 | 2.71 | .63 | .66 | | | | | green | | | | | | | | | | green | 5/16" | .55 | 2.71 | .63 | .66 | | | | | brown | | | | | | | | | | brown | 5/16" | .55 | 2.71 | .63 | .66 | | | | | blue | | | | | | | | | | blue | 5/16" | .55 | 2.71 | .63 | .66 | | | | | red | | | | | | | | | | red | 3/8" | .55 | 2.71 | .63 | .66 | | | | | green | | | | | | | | | | green | 3/8" | .55 | 2.71 | .63 | .66 | | | | | brown | | | | | | | | | | brown | 3/8" | .55 | 2.71 | .63 | .66 | | | | | blue | | | | | | | | | | blue | 3/8" | .55 | 2.71 | .63 | .66 | | | | | red | | | | | | | | | | red | | | | | | | | | | | |
| 1/4" x 5/16" | .55 | 2.08 | .63 | .27 | .23 | | | M 10 x 1 | green | | | | | | | | | | green | 1/4" x 5/16" | .55 | 2.08 | .63 | .27 | .23 | | | M 10 x 1 | brown | | | | | | | | | | brown | 1/4" x 5/16" | .55 | 2.08 | .63 | .27 | .23 | | | M 10 x 1 | blue | | | | | | | | | | blue | 1/4" x 5/16" | .55 | 2.08 | .63 | .27 | .23 | | | M 10 x 1 | red | | | | | | | | | | red | 5/32" x 1/4" | .55 | 2.08 | .63 | .27 | .23 | | | M 12 x 1 | green | | | | | | | | | | green | 5/32" x 1/4" | .55 | 2.08 | .63 | .27 | .23 | | | M 12 x 1 | brown | | | | | | | | | | brown | 5/32" x 1/4" | .55 | 2.08 | .63 | .27 | .23 | | | M 12 x 1 | blue | | | | | | | | | | blue | 5/32" x 1/4" | .55 | 2.08 | .63 | .27 | .23 | | | M 12 x 1 | red | | | | | | | | | | red | | | | | | | | | | | |
| 5/32" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 10 x 1 | green | | | | | | | | | | green | 5/32" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 10 x 1 | brown | | | | | | | | | | brown | 5/32" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 10 x 1 | blue | | | | | | | | | | blue | 5/32" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 10 x 1 | red | | | | | | | | | | red | 3/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | green | | | | | | | | | | green | 3/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | brown | | | | | | | | | | brown | 3/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | blue | | | | | | | | | | blue | 3/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | red | | | | | | | | | | red | 1/4" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | green | | | | | | | | | | green | 1/4" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | brown | | | | | | | | | | brown | 1/4" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | blue | | | | | | | | | | blue | 1/4" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | red | | | | | | | | | | red | 5/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | green | | | | | | | | | | green | 5/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | brown | | | | | | | | | | brown | 5/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | blue | | | | | | | | | | blue | 5/16" | .55 | 2.71 | .63 | .55 | .66 | .55 | .15 | M 12 x 1 | red | | | | | | | | | | red |
Plug | Con. A | Hex | L | D | L1 | L2 | Hex1 | B | G | Colour |
| 5/32" | | 1.85 | .59 | .66 | | | | | green | | | | | | | | | | green | 5/32" | | 1.85 | .59 | .66 | | | | | brown | | | | | | | | | | brown | 5/32" | | 1.85 | .59 | .66 | | | | | blue | | | | | | | | | | blue | 5/32" | | 1.85 | .59 | .66 | | | | | red | | | | | | | | | | red | 1/4" | | 1.85 | .59 | .66 | | | | | green | | | | | | | | | | green | 1/4" | | 1.85 | .59 | .66 | | | | | brown | | | | | | | | | | brown | 1/4" | | 1.85 | .59 | .66 | | | | | blue | | | | | | | | | | blue | 1/4" | | 1.85 | .59 | .66 | | | | | red | | | | | | | | | | red | | | | | | | | | | | |
| 5/32" x 1/4" | | 1.69 | .59 | .27 | .23 | | | M 10 x 1 | green | | | | | | | | | | green | 5/32" x 1/4" | | 1.69 | .59 | .27 | .23 | | | M 10 x 1 | brown | | | | | | | | | | brown | 5/32" x 1/4" | | 1.69 | .59 | .27 | .23 | | | M 10 x 1 | blue | | | | | | | | | | blue | 5/32" x 1/4" | | 1.69 | .59 | .27 | .23 | | | M 10 x 1 | red | | | | | | | | | | red | 1/4" x 5/16" | | 1.69 | .59 | .27 | .23 | | | M 12 x 1 | green | | | | | | | | | | green | 1/4" x 5/16" | | 1.69 | .59 | .27 | .23 | | | M 12 x 1 | brown | | | | | | | | | | brown | 1/4" x 5/16" | | 1.69 | .59 | .27 | .23 | | | M 12 x 1 | blue | | | | | | | | | | blue | 1/4" x 5/16" | | 1.69 | .59 | .27 | .23 | | | M 12 x 1 | red | | | | | | | | | | red | | | | | | | | | | | |
| 5/32" | .66 | 2.48 | | .66 | .55 | .55 | .15 | M 10 x 1 | green | | | | | | | | | | green | 5/32" | .66 | 2.48 | | .66 | .55 | .55 | .15 | M 10 x 1 | brown | | | | | | | | | | brown | 5/32" | .66 | 2.48 | | .66 | .55 | .55 | .15 | M 10 x 1 | blue | | | | | | | | | | blue | 5/32" | .66 | 2.48 | | .66 | .55 | .55 | .15 | M 10 x 1 | red | | | | | | | | | | red | 1/4" | .66 | 2.48 | | .66 | .55 | .66 | .15 | M 12 x 1 | green | | | | | | | | | | green | 1/4" | .66 | 2.48 | | .66 | .55 | .66 | .15 | M 12 x 1 | brown | | | | | | | | | | brown | 1/4" | .66 | 2.48 | | .66 | .55 | .66 | .15 | M 12 x 1 | blue | | | | | | | | | | blue | 1/4" | .66 | 2.48 | | .66 | .55 | .66 | .15 | M 12 x 1 | red | | | | | | | | | | red |
Plug | Con. A | Hex | L | D | L1 | L2 | Hex1 | B | G | Colour |
| 1/8" | .66 | 1.63 | | .35 | | | | | green | | | | | | | | | | green | 1/8" | .66 | 1.63 | | .35 | | | | | brown | | | | | | | | | | brown | 1/8" | .66 | 1.63 | | .35 | | | | | blue | | | | | | | | | | blue | 1/8" | .66 | 1.63 | | .35 | | | | | red | | | | | | | | | | red | 1/4" | .66 | 1.75 | | .35 | | | | | green | | | | | | | | | | green | 1/4" | .66 | 1.75 | | .35 | | | | | brown | | | | | | | | | | brown | 1/4" | .66 | 1.75 | | .35 | | | | | blue | | | | | | | | | | blue | 1/4" | .66 | 1.75 | | .35 | | | | | red | | | | | | | | | | red | | | | | | | | | | | |
| 1/8" | .66 | 1.49 | | .35 | | | | | green | | | | | | | | | | green | 1/8" | .66 | 1.49 | | .35 | | | | | brown | | | | | | | | | | brown | 1/8" | .66 | 1.49 | | .35 | | | | | blue | | | | | | | | | | blue | 1/8" | .66 | 1.49 | | .35 | | | | | red | | | | | | | | | | red | 1/4" | .66 | 1.88 | | .51 | | | | | green | | | | | | | | | | green | 1/4" | .66 | 1.88 | | .51 | | | | | brown | | | | | | | | | | brown | 1/4" | .66 | 1.88 | | .51 | | | | | blue | | | | | | | | | | blue | 1/4" | .66 | 1.88 | | .51 | | | | | red | | | | | | | | | | red |
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