FL-251709

Threaded Leaf Spring Bushing
4.5 Ratings
Part # FL-251709
UPC/GTIN# 601961388239
Availability In Stock (210)
Feature Specification
Part number TB78 (TB-78) ​
Type Threaded leaf spring bushing ​
Outside diameter (OD) 45 mm (1.772 inches) ​
Overall length (OAL) 105 mm (4.130 inches) ​
Thread size M33.5 x 4.0 (metric thread, 33.5 mm major diameter, 4 mm pitch) ​
Wall thickness 13 mm ​
Material Steel ​
Color Gray ​
Typical package 4 bushings per package 

Includes

  • Threaded steel bushing (sold individually or in 4-count packages depending on supplier).​
  • Grease seals typically sold separately.

The TB78 Threaded Bushing is a heavy-duty suspension component primarily used in the front spring assemblies of Mack and Volvo trucks, including Mack CHN, CHU Pinnacle; CTP, GU Granite; TD Titan; CXN Vision; CXP, CXU Pinnacle front suspensions, and Volvo VN, VT, VHD series. I

  • Designed for Volvo VN/VT/VHD and Mack CHN/CHU/CTP/GU/CXN/CXU front leaf spring suspensions to reduce vibration and maintain proper alignment.​
  • Used with grease seals to protect against dirt and moisture contamination in heavy-duty suspension applications.​
  • Direct replacement for OEM bushings; helps restore smooth operation and extend component life when original bushings wear or crack.

Cross Reference / Part Interchange

Manufacturer / Brand Part Number(s) Notes
Dayton / TruckSpring TB-78, TWTB-78 ​  
Volvo OE 1075724, 1075726, 20409623, 20409632, 20526026, 85134672 ​  
Mack OE 10QK3114M, 10QK3115M, 10QK3120M ​  
Hendrickson 051358-000, 051364-000, 051462-000 (51358, 51364, 51462)  
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