Pneumatic Fittings: Quick Selection Guide
Choose the Right Connection Type
Push-in fittings grip compatible tubing. Series 6000 Super Rapid fittings use a brass collet, while Series 7000 GRIPfit Automation uses a stainless steel gripping ring and reinforced PA66 body. GRIPfit supports repeated connection and a long life connection concept that can help reduce replacements and material waste.
Series 8000 Dual Seal fittings add an extra tube seal for applications that require a more reliable leak free connection. They have FKM seals as standard. Check sealing compatibility with the operating conditions.
Push-on fittings, including Series 1000 Rapid, secure tubing over a cone with a retaining nut. Some suit compatible low pressure liquids, including certain oils where specified.
Threaded adaptors connect ports or change direction. Selected Series S2000 Sprint fittings use integrated thread sealing without separate sealant when installed as specified.
Check Tube Size, Thread Standard and Sealing Method
Use vernier callipers to measure the tubing's outside diameter (OD) if the size is unknown. For push-on fittings, check the inside diameter (ID) too; 6/4 mm tubing has a 6 mm OD and 4 mm ID. See the Camozzi pneumatic tubing range for available sizes.
Next, check the port thread and sealing method:
- BSPP (G): a parallel thread, commonly used with a suitable face seal, O-ring or integrated sealing system.
- BSPT (R): a tapered male thread that needs the correct mating thread and sealing arrangement.
- Metric (M): often found on compact valves and actuators; the sealing method depends on the connection.
- NPT/NPTF: North American thread forms that should not be assumed interchangeable with BSP.
Nominal thread sizes can be misleading. Refer to the manufacturer's thread information or drawings to confirm the correct size, thread profile and seal.
Match Materials and Specialist Ranges to the Application
Material choice depends on the environment. Reinforced PA66 offers a lightweight option, nickel plated brass is widely used in automation and 316L stainless steel provides corrosion resistance for suitable applications.
Series H8000 is designed for dusty and dirty environments, including suitable aggregates applications. Unlike standard Series 8000, it specifically addresses contamination around the connection.
For greasing and lubrication, Series HP6000 supports oil and grease pressures up to 150 bar, compared with 60 bar for compressed air, subject to model and tubing specifications.
Series X6000 stainless steel fittings may suit certain marine and boat building installations. Check fluid compatibility, corrosion exposure and possible seawater contact.
For other fluids, GRIPfit Cooling uses bio sourced PA11 and EPDM seals for specified cooling duties; GRIPfit Medical and Beverage & Water Filtration serve their own applications. Series 9000 air brake fittings are intended for commercial vehicle air brake systems with specified tubing, including DIN 74324 or ISO 7628.
Always confirm the selected fitting's materials, media and operating limits.
Confirm Operating and Installation Requirements
Check pressure, temperature, media and tubing specifications together, along with airflow, space and whether repeated disconnection is needed.
Cut tubing squarely and follow the assembly instructions. For practical guidance, see Camozzi pneumatics training.
Example: A 6 mm Tube and G1/8 Valve Port
For a G1/8 female valve port and 6 mm OD polyurethane tube, choose a compatible 6 mm push-in fitting with a G1/8 male connection. Confirm sealing and working limits; push-on alternatives also require the tubing ID.
Frequently Asked Questions About Pneumatic Fittings