Stemco 640-0003 Hubodometer Vented Hub Cap Clear View

The Stemco 640-0003 is a Hubodometer vented hub cap designed for commercial truck and trailer wheel-end applications. This clear view hub cap features a transparent window that allows visual inspection of the hubodometer mileage counter without removing the cap, making fleet maintenance and mileage tracking more efficient.

Key Features:

• Vented design allows proper pressure equalization for synthetic-base grease applications
• Clear viewing window for easy hubodometer reading
• 6-1/4" bolt circle mounting pattern
• Includes gasket part number 330-3077
• Designed specifically for Fruehauf axle applications
• Spin-on threaded installation for secure mounting
• Durable construction meets commercial vehicle industry standards

This hub cap is commonly used on trailer and truck wheel ends to protect hub assemblies while providing convenient access to mileage information. The vented design is essential when using synthetic lubricants to prevent pressure buildup. Cross-reference numbers include OEM 1283 and Fruehauf 84075.