This 20mm 120mm to 140mm PC fan adapter converts between standard 120mm and 140mm fan or radiator mounting patterns. It can be used in either direction where the selected mounting style and available clearance allow.
The 20mm body provides a gradual transition between the two fan sizes for custom PC cooling, radiator clearance, case modifications and sim racing airflow setups.
The standard version is made in PETG with an 80°C (176°F) heat tolerance, selected for better heat resistance than PLA in warm PC, radiator and ventilation environments. For installations that may run hotter, a higher-temperature material option is available on request for most sizes; contact us before ordering to confirm suitability.
Available transitions include Round to Round, Round to Shroud, Shroud to Round and Shroud to Shroud, with Both Tabs, F1 Tabs, F2 Tabs or No Tabs. Use the listing images to confirm F1/F2 orientation.
Technical information
- Adapter thickness: 20mm.
- Compatibility: standard 120mm and 140mm PC fan and radiator mounting patterns.
- Transitions: Round to Round, Round to Shroud, Shroud to Round and Shroud to Shroud.
- Mounting-tab options: Both Tabs, F1 Tabs, F2 Tabs or No Tabs.
- Use the listing images to confirm F1/F2 tab orientation before ordering.
- Material: PETG.
- Maximum heat tolerance: 80°C (176°F).
- Hardware: longer fan screws or radiator mounting hardware may be required; screws are not included.
Higher-temperature option
A higher-temperature material version is available on request for most fan adapter configurations. Contact us before ordering if the adapter will be used in a warmer enclosure, exhaust path or other elevated-temperature application.
Airflow and fitment
The transition avoids a sharp step between the 120mm and 140mm openings. Final airflow depends on the fan, radiator or grille restriction, mounting direction and surrounding clearance. Check the selected style against the fan or radiator before ordering.
Made to order
This product is made to order.
