Pneumatic Products, Button Style Couplings & Nipples

Series 291, DN 5.5

  • Compact design
  • Complies with safety standard 4414
  • Disconnection in two stages


Compact and light quick-connect coupling, newly shaped in order to meet ergonomic and industrial design requirements. Series 291 has an easy and safe connection/disconnection and complies with ISO 4414 (safety standard). The nipple profile complies with ISO 6150 C.


The Series is also available in two larger sizes: Series 381 and 471.

Couplings Part No. Connection
Hose connection 10 291 3002 1029130026.3 mm (1/4")
 10 291 3003 1029130038 mm (5/16")
 10 291 3004 10291300410 mm (3/8")
Male thread 10 291 3152 102913152R 1/4"
 10 291 3154 102913154R 3/8"
 10 291 3155 102913155R 1/2"
Female thread 10 291 3202 102913202G 1/4"
 10 291 3204 102913204G 3/8"
 10 291 3205 102913205G 1/2"


Nipples Part No. Connection
Hose connection 10 291 5032 1029150326.3 mm (1/4")
 10 291 5033 1029150338 mm (5/16")
 10 291 5034 10291503410 mm (3/8")
Male thread 10 291 5131 102915131R 1/8"
 10 291 5132 102915132R 1/4"
 10 291 5134 102915134R 3/8"
Female thread 10 291 5231 102915231G 1/8"
 10 291 5232 102915232G 1/4"
 10 291 5234 102915234G 3/8"


Check with an authorized CEJN distributor for availability and prices. Other connections and sealing material on request. Some part numbers may be subject to minimum order quantities. CEJN reserves the right to make changes without further notification. Thread connections are listed according to ISO Standards.
Technical Data
Nominal flow diameter: 5.5 mm (7/32")
Air flow: 640 l/min (22.6 CFM)
Max. working pressure: 12 bar (174 PSI)
Min. burst pressure: 48 bar (696 PSI)
Temperature range: -20°C — +90°C (-4°F — +194°F)
Material coupling: Steel
Material nipple: Nickel-plated steel
Standards: ISO 6150 C DN 5.5
Markets: France

Flow capacity measured at 87 PSI (6 bar) inlet pressure and pressure drop at 7 PSI (0.5 bar).

Air Flow
Pressure drop, PSI (bar) Series 291, DN 5.5 Flow, CFM (l/min)

Available files for download

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