PM Pneumatic Bulkhead Union Fitting | 4mm-10mm Push-to-Connect
PM Pneumatic Bulkhead Union Fitting | 4mm-10mm Push-to-Connect
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Short Product Description
Short Product Description
Route air lines safely through enclosures with thePM Series Pneumatic Bulkhead Fitting. Designed for 4mm, 6mm, 8mm, and 10mm PU/Nylon tubing, this straight push-to-connect (PTC) union features dual locking nuts for secure, vibration-proof panel mounting. Built with rust-resistant pearl nickel-plated metal and double-layer internal seals, it handles up to1.0 MPa (145 PSI)with zero leaks. Need help with your pneumatic circuit?Sun Cheong Computer Co. Ltd.offers over 20 years of automation expertise. Visit our Sham Shui Po physical store for instant pickup and on-site tube sizing!
Key Features
Key Features
- Panel-Mount Design: Dual locking nuts allow for secure, clean routing of air hoses through machine enclosures and control panels.
- Instant PTC Connection: Tool-free push-to-connect design securely grips 4mm to 10mm PU/Nylon air tubing on both ends.
- Double-Layer Sealing: Advanced internal dual O-rings ensure a flawless, leak-proof connection up to 1.0 MPa (145 PSI).
- Rust-Resistant Finish: Pearl nickel-plated stainless iron construction withstands moisture and harsh workshop environments.
- No Thread Sealant Required: The air connection relies entirely on the PTC mechanism, meaning no messy Teflon tape is needed.
- Multiple Sizes Available: Choose from PM4, PM6, PM8, or PM10 to perfectly match your specific pneumatic tubing.
Full Product Description
Full Product Description
Secure Panel-Mount Pneumatic Routing
When building custom control boxes, robotic enclosures, or automated machinery, routing air hoses cleanly through metal or acrylic panels is a challenge. The PM Series Pneumatic Bulkhead Fitting is the perfect solution. It acts as a secure bridge, allowing you to pass compressed air lines through a solid barrier without pinching or damaging the tubing. The dual locking nuts clamp firmly onto the panel, ensuring the connection remains stable even in high-vibration industrial environments.
Instant Push-to-Connect Efficiency
Downtime is the enemy of productivity. Both ends of this bulkhead fitting feature advanced Push-to-Connect (PTC) technology. Simply push your polyurethane (PU) or nylon air hose into the black release ring, and the internal claws will instantly lock it into place. To release the tube, ensure the system is depressurized, press down the ring, and pull. No hose clamps or tools are required for the air connection.
Industrial-Grade Leak-Proof Design
Pneumatic leaks cause compressors to overwork and waste energy. The PM bulkhead fitting is engineered with a double-layer internal sealing ring and a hard plastic core to guarantee a 100% airtight connection, even under maximum operating pressures of 1.0 MPa (145 PSI). The main body is constructed from high-strength stainless iron with a pearl nickel-plated finish, ensuring exceptional resistance to rust and corrosion.
💡 Pro Tip from Our Technicians
"When mounting this bulkhead fitting, ensure you drill the correct hole size for the threaded body and tighten the dual locking nuts securely against your enclosure wall. Since both ends are push-to-connect, you do NOT need Teflon tape for sealing. If you are building a custom robotic enclosure and aren't sure which tube size (4mm, 6mm, 8mm, or 10mm) you need, bring your tubing to our Sham Shui Po store! Our team at Sun Cheong Computer Co. Ltd. will test-fit the exact PM adapter you need on the spot."
Technical Specifications
Technical Specifications
| Specification | Details |
|---|---|
| Available Models | PM4, PM6, PM8, PM10 |
| Applicable Tube OD | 4mm / 6mm / 8mm / 10mm |
| Fitting Type | Bulkhead Union Straight (Panel Mount) |
| Fluid Type | Compressed Air (Pneumatic Only) |
| Max Operating Pressure | 1.0 MPa (10 kgf/cm² / ~145 PSI) |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Applicable Tubing Material | Polyurethane (PU) / Nylon |
| Body Material | Pearl Nickel-Plated Stainless Iron |
| Internal Seal | Double-Layer Sealing Ring |
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
- Do I need to use Teflon tape on the threads of this fitting?No. The threads on the PM bulkhead fitting are strictly for the locking nuts to secure the fitting to a panel or enclosure wall. The air connection itself is handled entirely by the push-to-connect (PTC) ports on either end, which have built-in double-layer seals. No Teflon tape is required.
- How do I know which size to buy (PM4, 6, 8, or 10)?Pneumatic push-to-connect fittings are sized based on the Outer Diameter (OD) of the air tube. Use a caliper or a precise ruler to measure the outside width of your PU or Nylon hose. If it measures 8mm across, you need the PM8 fitting.
- How do I safely remove the air tube from the valve?First, ensure the air supply is turned off and the line is depressurized. Then, push the black plastic release ring inward (towards the metal body) and hold it down while pulling the tube out. Never forcefully yank the tube without pressing the ring, as this will damage the internal locking claws.
Target Users / Applications
Target Users / Applications
- Custom PC Modders & Water Cooling: Routing air or fluid lines cleanly through custom PC case panels.
- Factory Automation Builders: Passing pneumatic control lines through the walls of electrical control cabinets safely.
- Aquarium & Hydroponics DIYers: Creating clean, airtight pass-throughs for CO2 or air pump lines in custom acrylic tanks.
- Animatronics & Prop Builders: Routing air lines through the structural frames of stage props and escape room mechanisms.
