Series 342, DN 7.4

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Pneumatic Products

Safety Lock Couplings & Nipples

Series 342, DN 7.4

  • Automatic safety-locking feature
  • Extremely high flow capacity
  • One-hand operation

Series 342 couplings withstand extremely rough handling in extra tough applications. The Series features a zinc-plated steel construction with a locking sleeve made of hardened zinc-plated steel. The Series offers a wide range of connections, as well as anti-hose whip nipples. The automatic safety-locking feature prevents unintentional disconnection.


Please refer to the CEJN Breathing Air range for an all brass version (Series 341).

Technical data
Nominal flow diameter: 9/32Inch (7.4 mm)
Max. working pressure: 510 PSI (35 bar)
Min. burst pressure: 2030 PSI (140 bar)
Connection force: 103.0 N
Temperature range: -22°F — +212°F (-30°C — +100°C)
Material coupling: Zinc-plated steel
Material nipple: Hardened zinc-plated steel

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

Air Flow

Pressure drop, PSI (bar)

Flow, CFM (l/min)
Couplings Part No. Connection
Hose connection 1034210026.3 mm (1/4")
 1034210038 mm (5/16")
 10342100410 mm (3/8")
 10342100513 mm (1/2")
Male thread 103421152R 1/4"
 103421154R 3/8"
 103421155R 1/2"
 103421452NPT 1/4"
 103421454NPT 3/8"
 103421455NPT 1/2"
Female thread 103421202G 1/4"
 103421204G 3/8"
 103421205G 1/2"
 103421402NPT 1/4"
 103421404NPT 3/8"
 103421405NPT 1/2"
Stream-Line 1034210606.5 x 10 mm
 1034210628 x 12 mm


Nipples Part No. Connection
Hose connection 1034250026.3 mm (1/4")
 10342500410 mm (3/8")
 10342500513 mm (1/2")
Male thread 103425152R 1/4"
 103425154R 3/8"
 103425155R 1/2"
 103425452NPT 1/4"
 103425454NPT 3/8"
 103425556M16 x 1.5
Female thread 103425202G 1/4"
 103425204G 3/8"
 103425205G 1/2"
 103425402NPT 1/4"
 103425404NPT 3/8"
Stream-Line 1034250606.5 x 10 mm
 1034250628 x 12 mm


Anti-Hose Whip Nipples Part No. Connection
Hose connection 103428004 10 mm (3/8")
 10342800513 mm (1/2")


Thread connections are listed according to ISO Standards. All measurements are in mm. Check with an authorized CEJN distributor for availability and prices.