Stemco 450-4973 Pro-Torq Spindle Nut Keeper Retaining Ring Wheel Bearing Retainer

The Stemco 450-4973 is a replacement keeper (retaining ring) designed specifically for use with the Stemco 449-4973 Pro-Torq axle spindle nut. This essential component secures the Pro-Torq spindle nut in place, maintaining precise bearing adjustment and preventing loosening under heavy-duty commercial vehicle operation.

Key Features:

• OEM replacement keeper for Stemco Pro-Torq spindle nut system
• Engineered for Dana Spicer EST-230-P, P22, and TQ axles
• Compatible with 3 1/4"-12 thread size spindle nuts
• Works with HM518445/HM518410 outer bearing applications
• Lightweight design at approximately 0.53 lbs
• Manufactured to ISO-9001:2015 quality standards

The Pro-Torq system provides precise bearing adjustment that helps extend wheel end life, maximize tire performance, and reduce maintenance costs on commercial trucks and trailers. This keeper ensures the spindle nut remains properly secured, maintaining the critical low-end play adjustment that makes the Pro-Torq system effective. Cross-references include Meritor R009528 and Ceromet K3250.