Automann 750.2638NT Pinion Lock Nut M45x1.5 for Meritor 40X1233

Automann 750.2638NT Differential Pinion Lock Nut (M45x1.5)

Maintain critical bearing preload and secure your drivetrain components with the heavy-duty Automann 750.2638NT Differential Pinion Lock Nut. Engineered to Fleet Standard specifications, this premium industrial fastener is precision-machined to secure vital components within commercial drive axle carrier assemblies.

Built to handle high rotational torque, intense vocational chassis vibrations, and extreme thermal cycles, this lock nut delivers a dependable factory-level hold, preventing gear alignment shifting and costly differential rebuilds.

Product Specifications

• Brand: Automann

• Part Number: 750.2638NT

• Alternate Part Number: 40X1233

• Product Level: Fleet Standard

• Component Type: Differential Pinion Lock Nut

• Unit Size: 1 PC

• Weight: 0.4 lbs

• Package Dimensions: 1.7" x 1.7" x 0.9"

• Shipping: Parcel Friendly

• UPC Code: 889626259944

• Category: Power Train Differential Pinion Nuts

Critical Technical Dimensions:

• Thread Sizing: M45 x 1.5 - 6H (45mm Metric Thread)

• Nut Height: 24.00 mm

• Width Across Flats (WAF / Socket Size): 56.20 mm

Heavy-Duty Vehicle Applications

This premium drive axle lock nut is a direct factory replacement widely utilized across major commercial truck platforms equipped with compatible Meritor differential carriers, including:

• Meritor Heavy-Duty Drive Axle Carrier Assemblies

• Commercial Class 8 Tandem Axle Configurations

Direct OEM & Aftermarket Cross-Reference

Ensure a precise mechanical match before servicing your carrier. This component serves as a high-quality alternative to the following original equipment manufacturer numbers:

Key Performance Benefits

• Critical Preload Retention: Specially engineered to stay locked tight under continuous high-torque cycles, preserving precise pinion bearing adjustment and gear backlash configurations.

• Exact Metric Blueprinting: Machined to strict M45x1.5-6H tolerances with a precise 56.20mm hex pattern to guarantee smooth, binding-free thread engagement and eliminate cross-threading issues during installation.

• Commercial-Grade Toughness: Forged from high-tensile structural alloy steel to handle the extreme torque tolerances required during heavy-duty fleet servicing and aggressive engine braking cycles.