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Lab Tested Serpentine Belt / Fan Belt For M939a2 6cta8.3- 3912004 Now On Sale [HAFI78oB]

$16.99 $54.99 -69%

FAN BELT FOR M939A2 TRUCKS WITH THE CUMMINS 6CTA 8.3 LITER TURBO ENGINE.NOT FOR M939A1 TRUCKS WITH THE 250 CUMMINS, BUT I DO ALSO HAVE THOSE BELTS IN STOCK.PART #' 3912004 NSN 3030-01-271-3754  ALTERNATE NUMBERS 3289191, 20-3945, 5080680, 680K5, K080

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Lab Tested Serpentine Belt / Fan Belt For M939a2 6cta8.3- 3912004 Now On Sale [HAFI78oB]

FAN BELT FOR M939A2 TRUCKS WITH THE CUMMINS 6CTA 8.3 LITER TURBO ENGINE.

NOT FOR M939A1 TRUCKS WITH THE 250 CUMMINS, BUT I DO ALSO HAVE THOSE BELTS IN STOCK.

PART #' 3912004 NSN 3030-01-271-3754  ALTERNATE NUMBERS 3289191, 20-3945, 5080680, 680K5, K080680, 4080680

What Our Customers Say

January 21, 2026

Absolutely no complaints!

Works flawlessly, just as described.

- Chris J..

January 21, 2026

Absolutely no complaints!

The product is a very good quality tool.

- Maeve C..

January 21, 2026

Absolutely no complaints!

It's a very well-made and reliable kit.

- Etta P..

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