TB78 | Mack Threaded Bushing
+1-989-755-0561 1-800-358-4751

Threaded Bushing | Mack-Volvo


Typically ships in 7 to 10 business days.

Threaded bushing TB78 for front spring, Mack use with M5450 threaded spring pin. Uses MVT11 seals. Volvo VN series, use with M5450 and M5451 threaded spring pin. Replaces Mack part 10QK3114M, 10QK3115M, Volvo-White 1075724, 1075726, 20409623, 20526026, 85134671 and 85134672.

Product Specs for Automann TB78

  • Outside Diameter:45MM
  • Length:105MM
  • Inner Thread:M33.5 - 4
  • Flagg Number:TB78
  • Mack Number:10QK3114M (with seals), 10QK3115M (without seals)
  • Volvo Number:1075724, 1075726, 20409623, 20526026
  • Note:Use with M5450 threaded spring pin. Uses MVT11 seals.
  • MPN: TB78
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Automann TB78 Details

Customer Q&A - Automann TB78


Automann is premier global distributor and manufacturer of aftermarket truck and trailer chassis parts. Automann offers more than 10,000 products for heavy duty truck and trailers ranging from air brake & wheel to suspension components and just about everything in between.

Automann is headquartered in Somerset, NJ and operates a satellite west coast distribution facility in Ontario, CA.Formed in 1994 Automann has evolved into a leader in the heavy duty aftermarket. Automann is committed to the long term success of its distributors and continues to invest in expanding its product offering and improving its services.

At TruckSpring we have been working with Automann since their beginning. We stock a complete line of Automann heavy duty truck parts and have a great working relationship with Automann.

Automann Products Warranty

1 Year Limited Warranty

On all Automann products against defects in workmanship or material for a period of 1 year.

What the warranty does not cover

Damage from accidents, corrosion, improper installation, incorrect applications, overloading, and custom applications that are not specified under the OEM cross references. This warranty does not cover loss of freight, loss of profit, equipment, or personal downtime.

How to get service

If an Automann product failure results from a manufacturer defect, contact us at Michigan Truck Spring for support. You can contact us by phone at 1-800-358-4751 or by using our contact form.

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