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Specifications

The Meritor E5988L Inner Cap Nut is a critical OEM wheel-end component used to properly adjust and secure hub bearings in heavy-duty commercial truck applications. Manufactured to strict Meritor standards, this inner cap nut helps maintain correct bearing preload, reduce wear, and support long-term wheel-end reliability. Proper installation of the inner cap nut is essential for safe vehicle operation and braking performance. Ideal for wheel-end service or preventative maintenance, the E5988L is trusted by professional technicians and fleet operators. Wofford Truck Parts supplies this inner cap nut to ensure dependable fitment, durability, and performance.
Weight
0.52

Compatibility

Heavy-duty trucks with dual-mounted aluminum wheels (3/4"-16 inner thread applications)
Trailers using Meritor axle assemblies (wheel-end systems)
Freightliner
International/Navistar
Mack
Volvo
Western Star


Alternative Part Numbers

  • 511003L
  • 511009L
  • 988L
  • Alcoa 5548L
  • Alcoa 5988L
  • Automann 2011007L
  • BWP M137
  • Euclid E5988L
  • M2401
  • Meritor R005988L
  • W487
  • W625

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