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Derale 20" Fan Clutch Fan

Derale 20" Fan Clutch Fan

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Derale 20" Fan Clutch Fan Black D17120
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20" Diameter x 2" deep, durable, steel, replacement fan is guaranteed to offer maximum full-time airflow and fit most OEM clutches. Lowest Prices for the best radiator fans from Derale. Derale 20" Fan Clutch Fan part number D17120 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (7)
  • Q & A (0)
  • Photos
  • Why etrailer?

Derale Radiator Fans

  • 20 Inch Diameter
  • Belt-Driven Fans
  • Standard Rotation
  • Clutch Fans
  • Derale
  • Black

20" Diameter x 2" deep, durable, steel, replacement fan is guaranteed to offer maximum full-time airflow and fit most OEM clutches.


  • Offers maximum full-time airflow
  • Serves as replacement for factory fan
    • 8-Hole hub fits most OEM clutches
  • Constructed of durable steel with black powder coat finish
  • Made in USA


  • Dimensions: 20" diameter x 2" deep
  • Flange adjustability: 2-3/8" - 2-19/32"
  • Rotation: standard
  • 1-Year warranty


17120 Derale Standard Rotation Fan Clutch Fan

Item # D17120

Customer Reviews

Derale 20" Fan Clutch Fan - D17120

Average Customer Rating:  4.9 out of 5 stars   (7 Customer Reviews)

20" Diameter x 2" deep, durable, steel, replacement fan is guaranteed to offer maximum full-time airflow and fit most OEM clutches.


This fan for my Dodge truck was very hard to find. I came across and the picture and decription of it was what I needed. I got it very quickly and it was a perfect fit for my old fan clutch. It showed the right way the fan was suppose to turn. Installed it and now my truck is back on the road. Great fan and great price. I was very satisfied about the whole experience starting from the very nice sales lady that took my infomation.I would highly recommend to anyone looking for great products at great prices. 5 stars

What year truck and was it a diesel?
-- comment by: Julie - 08/18/2015

1994 dodge 3500 5.9L diesel with 390,000 miles
-- comment by: vince - 08/18/2015

Gloria K - 06/28/2016


Overall great product, this application was to replace the factory 19.25" fan one a Ford F-350 with the 7.5 liter gas engine, it required shifting the fan shroud over 1/4" to allow for blade clearance, pulls more air than the factory 5 blade did and does with with less noise and engine strain. highly recommend this unit as a replacement for OEM fans.

A year later and still as good as day one!
Tom T - 09/10/2015


I had been searching for a 12 valve cummins replacement fan for a fee months and found this one noted on a forum. The stock fans are discontinued and junk yards around here want rediculous prices for them. With a little bit of die grinding (could have been done in a few minutes with a round file) it fit right over the dodge cummins clutch. Couldn't be happier. Fits perfect and saved me a large chunk of money. Thanks Derale for making a fan to fit.


Had concerns about the smaller diameter. But have not had any cooling issues. Fit and clearances were good. Took forever to get it.


Well constructed from heavy material. Much higher quality than the chinese crap i looked at in the auto parts store. As expected it is a little more noisy than the stock fan, but it provides a ton more air flow. So far om very happy with this product.


Cools very well! Took a half round file to fit the hub to the fan clutch. Not noticeable loud.


bought as a set with clutch hub , and was able to get my truck back on the road .
I am very pleased with the parts I received .


Ask the Experts about this Derale Radiator Fans

  • Determining Fit of Replacement Radiator Fan for 2002 Dodge Ram 3500
    Derale's radiator fans are designed as a universal-type fit item so that the fans can fit a wide variety of vehicles. To be sure that either of the fans you are looking at, the Derale 20 Inch Rigid, Steel-Blade Race Fan, Belt Driven # D17320 and the Derale 20 Inch Fan Clutch Fan # D17120, will fit well on your 2002 Dodge 3500 the best solution is to measure the space available for the radiator fan. I spoke with my contact at Derale and he confirmed that measuring is the best way to determine...
    view full answer...
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  • Recommendation for a 1997 Dodge Ram 3500 Diesel and Mounting a Derale 20 Rigid Belt Driven Fan
    According to my contacts at Derale the 20 inch Rigid Steel Blade Race Fan # D17320 can not be mounted to a fan clutch, it is considered a rigid mounting system. This fan is considered a standard rotation, has a maximum rpm rating for up to 8,000 rpm. However, if you would like to consider a fan that will mount to your fan clutch, then you would need the # D17120. This style of fan would mount to your existing fan clutch, and would not need a spacer for mounting. It is also a standard rotation...
    view full answer...
  • Replacement Fan Clutch and Blade For 1984 Ford F-250
    I may have an option for you but Flex-A-Lite does not have a proper belt driven fan for the 1984 Ford F-250. You will need Derale Thermal Fan Clutch part # D22052 and one of the following fans depending on how much space you have available. 17" Fan part # D17117 18" Fan part # D17118 19" Fan part # D17119 20" Fan part # D17120
    view full answer...

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Info for this part was:

Employee DeAnne T
Updated by:
DeAnne T
Employee Adele M
Updated by:
Adele M
Employee Daron K
Updated by:
Daron K

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