Set of four Kee 051 metal compression fittings with color-coded rings, arranged in two rows (red, teal, copper, blue).
Nominal Diameter 5mm

051 Series | Single Shut Off Quick Release Couplings & Plugs

The 051 Series has a 5mm bore keyed and colour coded quick release coupling designed to prevent mix-ups when connecting multiple hose lines. Four distinct colours:
CG (green), TC (brown), HB (blue) and OR (red)
Available in male/female BSPP thread and hose tail configurations. Ideal for multi-circuit installations where cross-connection would be dangerous or costly.

Connector illustrated with a color/shape legend: green circle, brown pentagon, blue hexagon, red octagon, and dimension callouts for diameters and height.

Male Thread BSPP Coupling

Part Number Thread Length Diameter
051CKMP18BNXCG 1/8" 47mm 16mm
051CKMP18BNXHB 1/8" 47mm 16mm
051CKMP18BNXOR 1/8" 47mm 16mm
051CKMP18BNXTC 1/8" 47mm 16mm
051CKMP14BNXCG 1/4" 49mm 16mm
051CKMP14BNXHB 1/4" 49mm 16mm
051CKMP14BNXOR 1/4" 49mm 16mm
051CKMP14BNXTC 1/4" 49mm 16mm

Female Thread BSPP Coupling

Part Number Thread Length Diameter
051CKFP18BNXCG 1/8" 47mm 16mm
051CKFP18BNXHB 1/8" 47mm 16mm
051CKFP18BNXOR 1/8" 47mm 16mm
051CKFP18BNXTC 1/8" 47mm 16mm
051CKFP14BNXCG 1/4" 49mm 16mm
051CKFP14BNXHB 1/4" 49mm 16mm
051CKFP14BNXOR 1/4" 49mm 16mm
051CKFP14BNXTC 1/4" 49mm 16mm

Hose Tail Coupling

Part Number Hosetail Length Diameter
051CKFP06BNXCG 6mm 69mm 16mm
051CKFP06BNXHB 6mm 69mm 16mm
051CKFP06BNXOR 6mm 69mm 16mm
051CKFP06BNXTC 6mm 69mm 16mm
051CKFP09BNXCG 9mm 69mm 16mm
051CKFP09BNXHB 9mm 69mm 16mm
051CKFP09BNXOR 9mm 69mm 16mm
051CKFP09BNXTC 9mm 69mm 16mm

Male Thread BSPP Plug

Part Number Thread Length
051PKMP18BXXCG 1/8" 39mm
051PKMP18BXXHB 1/8" 39mm
051PKMP18BXXOR 1/8" 39mm
051PKMP18BXXTC 1/8" 39mm
051PKMP14BXXCG 1/4" 41mm
051PKMP14BXXHB 1/4" 41mm
051PKMP14BXXOR 1/4" 41mm
051PKMP14BXXTC 1/4" 41mm

Female Thread BSPP Plug

Part Number Thread Length
051PKFP18BXXCG 1/8" 38mm
051PKFP18BXXHB 1/8" 38mm
051PKFP18BXXOR 1/8" 38mm
051PKFP18BXXTC 1/8" 38mm
051PKFP14BXXCG 1/4" 40mm
051PKFP14BXXHB 1/4" 40mm
051PKFP14BXXOR 1/4" 40mm
051PKFP14BXXTC 1/4" 40mm

Hose Tail Plug

Part Number Hosetail Length Diameter
051PKHT06BXXCG 6mm 47mm 15mm
051PKHT06BXXHB 6mm 47mm 15mm
051PKHT06BXXOR 6mm 47mm 15mm
051PKHT06BXXTC 6mm 47mm 15mm
051PKHT09BXXCG 9mm 47mm 15mm
051PKHT09BXXHB 9mm 47mm 15mm
051PKHT09BXXOR 9mm 47mm 15mm
051PKHT09BXXTC 9mm 47mm 15mm

Bulkhead Hosetail Plug

Part Number Hosetail Length
051PKBH06BXXCG 6mm 63mm
051PKBH06BXXHB 6mm 63mm
051PKBH06BXXOR 6mm 63mm
051PKBH06BXXTC 6mm 63mm

Advantages

  • Four key codes with matching colours.
  • Single handed operation.

Technical Specifications

Coupling Specifications

Back Body: Brass (MS 58)
Valve Body: Brass (MS 58)
Sleeve: Brass (MS 58)
Spring: Stainless Steel 301
Locking Ring: Stainless Steel 301
Locking Balls: Stainless Steel 301

Plug Specifications

Plug Body: Brass (MS 58)

Working Limits

Working Temperature

-20°C to +100°C (NBR) | -40°C to +130°C (EPDM) | -15°C to +200°C (Viton)

Working Pressure

35 Bar (safety factor 4:1)

Maximum static working pressure with safety factor 4:1

Interchangeability

Interchangeable With:
  • Parker-Rectus 21 Rectu-Key
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