Noctua NA-FG1-4 Sx2 40mm Fan Grills Set of 2 Black

Premium 40mm Fan Protection

The Noctua NA-FG1-4 Sx2 is a set of two premium-grade matte-black fan grills designed for 40mm fans. They provide reliable protection against finger contact and cable intrusion in PCs, 3D printers, and home ventilation systems. The package includes eight fan screws and eight tool-free push-pin mounts for flexible installation. Builders seeking a simple safety upgrade for small-form-factor cooling will appreciate the straightforward mounting options.

Offset Design for Airflow Headroom

Round struts and an offset structure minimise airflow restriction while maintaining strong physical guarding. The push-pin system adds a further 5mm offset that reduces influx turbulence, helping the fan sustain smoother operation and better acoustic performance. In tight chassis where every millimetre of static pressure matters, this design preserves more headroom than flat-profile guards. Users who need maximum unrestricted flow for high-impedance radiators may still prefer running without any grill.

Tool-Free Mounting Practical Limits

The push-pin mechanism allows quick installation or removal even when fans are already secured in a case, saving time during maintenance. Fixed screw holes remain available for permanent mounts where vibration resistance is critical. The grills fit standard 40mm fan frames only; they cannot adapt to larger or non-standard mounting patterns. Enthusiasts building custom ducting or non-PC enclosures should verify hole spacing before committing to the push-pin method.