⚡ Key Takeaways
- Four product families: rivet-type parts (blind and press-in), screws (anti-loosening, sealing, captive), UQD liquid-cooling couplings and high-current PCB/SMT terminals.
- Liquid cooling is the new baseline: UQD couplings are drip-free, high-flow and quick-connect, used to join cold plates and manifolds in AI servers.
- Captive screws: the screw stays with the panel when it is removed, so maintenance never loses hardware.
- Grounding standoffs: press-in grounding terminals provide the chassis ground path.
- High-current terminals: pre-applied locking on male and female threads gives conductivity plus a reliable threaded joint.
- Sealing: sealed press-in standoffs and adhesive-coated blind rivet nuts reach IP68.
- Flush rivets: for sheet-metal cabinets with tight flatness requirements.
1. Why AI servers need purpose-built fasteners
2. The four product families
3. UQD liquid-cooling couplings
4. Captive panel screws
5. Selection logic and FAQ
1. Why AI servers need purpose-built fasteners
AI racks are dense and power-hungry — 30–100 kW per rack — which puts specific demands on fasteners:
- Anti-loosening: fan arrays vibrate constantly, and one loose screw can cause a cooling failure;
- Grounding: EMC requirements are strict, so the chassis ground path must be reliable;
- Liquid-tight joints: cold plate circuits must not leak;
- Serviceability: panel screws must not fall into the rack.
2. The four product families
2.1 Rivet-type: blind rivet nuts and press-in fasteners (sealed and unsealed)
- Press-in nuts, standoffs and blind rivet nuts fasten HPC/AI sheet-metal chassis;
- Press-in grounding terminals provide the chassis ground connection;
- Sealed press-in standoffs and adhesive-coated blind rivet nuts serve cabinets that must stay water-tight, up to IP68;
- Flush rivets suit cabinets with tight flatness requirements.
2.2 Screws: anti-loosening, sealing and captive
- Bolts are secured by combining elements with pre-applied threadlocking adhesive (chemical plus mechanical);
- Adhesive or an O-ring under the head or on the thread gives sealing up to IP68;
- Captive screws stay attached to the panel after removal.
2.3 PCB / SMT
- Tin-plated copper nuts reflow onto the board to create a threaded anchor, supplied on tape and reel;
- High-current terminals carry current into the PCB while forming a reliable threaded joint, with pre-applied adhesive on both threads;
- Super screws connect stacked PCBs and attach boards to sheet metal.
3. UQD liquid-cooling couplings
AI chip power has passed 1,000 W, air cooling is no longer sufficient and liquid cooling has become standard. The UQD (universal quick disconnect) coupling is the critical part of that loop:
- Drip-free: no coolant escapes during connection or disconnection;
- High flow: meets cold plate flow requirements;
- Quick connect: racks can be serviced quickly during maintenance.
4. Captive panel screws
Server panels are opened frequently for maintenance. Ordinary screws get lost inside the rack or end up mixed together. A captive screw stays mounted in the panel after the panel is removed:
- No lost hardware during service;
- No screw falling into the rack and shorting a board;
- No mixing of screws when swapping boards.
5. Selection logic and FAQ
Three questions
- Is it a liquid-cooled rack? Then UQD couplings and IP68 sealed press-in parts.
- Is it a service panel? Then captive screws.
- Is it a high-current PCB? Then high-current terminals with pre-applied adhesive.
FAQ
Q: Why do server screws need pre-applied adhesive? Fan vibration is severe and uncoated screws work loose. Nylon patches are removable; chemical adhesive needs heat to break.
Q: What is different about a grounding standoff? The contact faces are left uncoated, so resistance stays stable — exactly what EMC grounding needs.
Q: What if a UQD coupling leaks? Specify a drip-free design with self-closing valves on both halves, so nothing escapes on site.
👉 Engineering services ｜ 👉 Request a technical quote