STEMCO part description

Features & Benefits

  • Thread form reduces cross-binding on slightly worn spindles
  • Retention clips pair cleanly with common wheel-end locking hardware
  • Coating minimizes oxidation during long off-season storage
  • Shape supports controlled torque distribution across the spindle shoulder
  • Compatible with socket extensions in deep-hub layouts
  • Maintains seating stability during high-heat brake events

Stemco Protorq Axl Nut

The Stemco Protorq Axl Nut provides a rigid lock system to retain wheel bearings at the correct axial setting, using a 2-5/8"-16 thread size paired with an 8-point tool interface for secure torque application. Its multi-stage retention layout preserves adjustment accuracy by resisting back-off during vibration, helping wheel-end assemblies operate with consistent bearing load. The nut’s heavy-profile machining helps it mate firmly to spindles found on many trailer axles, and the tool socket design simplifies torque checks during scheduled inspections. This fastening approach gives fleet shops a dependable method for holding critical wheel components firmly in place. Shop the Stemco 447-4743.

Product Attributes

Outer Bearing Cone/Cup HM212049 / HM212011
REPLACEMENT KEEPER PART NUMBER 450-4743
Thread Size 2 5/8-16 IN
TOOL SOCKET 3 3/4- 8 Point (OTC# 1925) IN
ZIP-TORQ CROSS REFERENCE 400-4743
Thread Size 2 5/8-16
TOOL SOCKET 3 3/4- 8 point (OTC# 1925)
Thread Size 2 5/8 in.-16

Additional Information

Harmonized Tariff Code (HTS) 7318160085
UPC 00703832174658
VMRS Code 012002005

Part Interchanges

STEMCO® is a recognized global leader in manufacturing and supplying a comprehensive line of high-performance systems and components to the commercial vehicle industry. Its wide range of products includes wheel-end components, such as fasteners, hubcaps, bearings, seals, and mileage counters, and brake parts, which include brake drums, brake pads, and adjusters. It also offers suspension products like spring pins, king pin kits, polyurethane suspensions, tie rod assemblies, and mount and blocking components. All these products are made to the highest quality and safety standards to ensure superior performance and maximum durability even when used in the harshest of conditions. STEMCO is ISO-9001:2015 certified.

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