Nut 688-0642

positive OEM
Paccar
Part# 688-0642
note
Self-locking hex nut for driveline and transfer case assemblies
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shipping-move Ships in 1-3 days
non-returnable Non-returnable info
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Description

The Fabco 1-3/4-16 UN-3B Hex Self-Locking Nut (688-0642) is a fastening component designed to secure assemblies in heavy-duty driveline and transfer case applications. It provides mechanical locking to maintain tightness under vibration and torque conditions common in commercial vehicle systems.

Key Specifications

  • Application: Transfer case, PTO, steerable drive axle
  • Function: Mechanical fastening with vibration resistance
  • Compatibility: Heavy-duty trucks, commercial driveline systems
  • Construction: Steel
  • Features: Hex shape, 1-3/4-16 UN-3B thread, self-locking design
  • Quality: OEM Fabco part

Shipping Info

Next Day Air services are available for In Stock items. Our shipping cutoff time is Monday - Friday 4:30pm Eastern Standard Time (EST). 

 

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More Information

Current Part# 688-0642
Type OEM
Manufacturer Paccar
Warranty Standard Manufacturer Warranty