The Valcrum ST-400L aluminum hub cap is engineered for 10,000–16,000 lb trailer axles, offering a premium replacement for traditional plastic oil/grease caps. With a 4" machined thread and a rugged aluminum alloy body, this cap supports both grease-packed and oil bath systems. Its integrated oil level sight window, magnetic vent plug, and drain/fill ports make it ideal for high-performance, service-friendly applications.

Detailed Information:

Fitting:

Designed to fit Lippert and Dexter hubs with 10K–16K capacity. Replaces Lippert 693935 and Valcrum ST-400 (produced after 08/2019). Compatible with both grease and oil bath hub configurations. Uses 4" standard threads and installs using the included hardware.

Features:

• Premium Aluminum Construction: Durable and corrosion-resistant for long-lasting performance.
• Integrated Sight Window: Allows visual monitoring of oil level without removing the cap.
• Magnetic Vent Plug: Captures metal particles to help protect internal axle components.
• Service Ports: Built-in drain and fill ports for easy fluid maintenance.
• Complete Kit: Includes gasket, O-ring, fill plug, vent plug, retainer ring, screws, and lens.

Kit Contents:

• (1) Hub Cap
• (1) Oil Level Lens
• (1) Retainer Ring
• (1) Foam Gasket
• (1) Oil Cap Gasket
• (1) Magnetic Vent Plug
• (1) 1/8"-27 NPTF Fill Plug
• (1) O-Ring
• (6) Torx Screws

Interchangeable Part Numbers:

• ST-400L
• Lippert 693935
• ST-400 (Post 08/2019)

Product Overview:

The Valcrum ST-400L is a high-performance, 4" universal aluminum hub cap for 10K–16K axles. Designed to outlast plastic alternatives, it features a visible oil window, magnetic debris filtration, and easy-access fluid ports—all in a rugged, service-ready form. Perfect for commercial trailers and fleets requiring reliable, long-term axle protection.