At a Glance
- SKU: ST-400
PRODUCT INFORMATION
Product Details
Heavy-Duty Trailer Axle Hub Cap / Grease & Oil Bath Service
ONE 4" Valcrum Aluminum Hub Cap 10K 12K 15K Trailer Axle Grease/Oil 21-36 Dexter
One complete Valcrum aluminum hub cap assembly for compatible heavy-duty trailer axle hubs. Designed for grease and/or oil bath applications with an oil level window, magnetic vent plug, and drain/fill service port.
Part Number: ST-400 4" Threaded Hub Cap One Complete Cap Assembly
Key Measurements & Specs
| Specification | Detail |
|---|---|
| Part Number | ST-400 |
| Brand | Valcrum |
| Product Type | Aluminum trailer axle hub cap assembly |
| Cap Size | 4" hub cap application |
| Depth | 1-7/8" deep |
| Material | Aluminum alloy body |
| Lubrication Type | Grease and/or oil bath applications |
| Quantity Included | 1 complete hub cap assembly |
Fitment / Application
| Category | Details |
|---|---|
| Trailer System | Heavy-duty trailer axle wheel-end hub cap |
| Common Axle Range | Fits many 10K, 12K, and 15K trailer axle hub applications |
| Replacement Reference | Direct replacement reference for Lippert 693935 |
| Fitment Method | Verify existing hub cap size, thread style, cap depth, and hub application before ordering |
| Important Note | Axle capacity alone does not guarantee fitment. Match the cap to the hub. |
Top Features
| Feature | Buyer Benefit |
|---|---|
| Aluminum Alloy Body | Durable service replacement for compatible heavy-duty hub applications |
| Oil Level Window | Allows quick visual oil level inspection on oil bath setups |
| Magnetic Vent Plug | Helps collect metallic particles from the wheel-end lubrication system |
| Drain / Fill Port | Provides easier hub service access during maintenance |
Overview
This listing is for one complete Valcrum ST-400 4" aluminum hub cap assembly. It is designed for compatible heavy-duty trailer axle hubs using grease and/or oil bath lubrication. This cap is commonly used as a replacement reference for Lippert 693935 on matching 10K, 12K, and 15K trailer axle hub applications.
R&P Service Insight
Hub caps are measurement-specific parts. Before ordering, match the replacement cap to the hub style and thread size, not just the axle capacity.
- Measure First: Confirm the existing hub cap is a 4" style and verify the depth requirement.
- Check the Hub: Inspect hub threads and sealing surfaces before installing the new cap.
- Match the System: This cap is intended for grease and/or oil bath hub service.
R&P Knowledge Hub
Compatibility: Commonly used on matching heavy-duty trailer hub applications for 10K, 12K, and 15K axles where the 4" cap style matches.
Vehicle / System Fit: Trailer axle wheel-end hub cap for grease and/or oil bath hub systems.
Installation Notes: Clean the hub face, inspect the threads, replace the gasket components included in the kit, and confirm proper seating before filling or servicing the hub.
Performance Insight: The oil level window helps with visual inspection, while the magnetic vent plug helps collect metallic particles inside the hub lubrication system.
Brand & Fitment Note
Selling Brand: Valcrum
Application Reference: Lippert 693935 is used as a replacement reference for compatible applications only.
What This Means: This listing is for a Valcrum ST-400 aluminum hub cap assembly, not a guaranteed OEM-branded Lippert component unless specifically stated on the product packaging.
Before Ordering: Verify hub cap size, thread style, cap depth, axle capacity, grease/oil bath setup, and included components before installation.
R&P Repair Insight
Replacing a hub cap is usually straightforward, but leaks can still occur if the hub surface, gasket, plug, or threads are damaged. A correct cap still needs a clean sealing surface and proper installation.
- Sealing Surface: Make sure the hub face is clean, flat, and free of old gasket material.
- Thread Condition: Do not force the cap if the hub threads are damaged or cross-threaded.
- Lubrication Service: Refill and service the hub according to the axle or hub manufacturer's lubrication requirements.
Features
Complete Hub Cap Assembly
Includes the cap, gasket components, lens, retainer ring, screws, plugs, and O-ring needed for a complete cap replacement.
Aluminum Alloy Body
Built with an aluminum alloy body for heavy-duty trailer axle wheel-end service.
Grease / Oil Bath Compatible
Designed for compatible hubs using grease and/or oil bath lubrication systems.
Service-Friendly Design
Oil level window, magnetic vent plug, and drain/fill port help simplify inspection and maintenance.
Included Components
| Quantity | Item |
|---|---|
| 1 | Aluminum hub cap |
| 1 | Gasket |
| 1 | Lens |
| 1 | Retainer ring |
| 1 | Foam gasket |
| 6 | Torx screws |
| 1 | Magnetic vent plug |
| 1 | 1/8"-27 plug |
| 1 | O-ring |
Important Fitment Note: This listing is for one complete Valcrum ST-400 hub cap assembly. Verify your existing cap size, thread style, cap depth, axle/hub application, and grease or oil bath setup before ordering. Lippert 693935 is listed as a replacement reference only for compatible applications.
Valcrum ST-400 4 inch aluminum hub cap, ST-400 trailer axle hub cap, Valcrum aluminum oil cap, 4 inch trailer hub cap, grease oil bath hub cap, Lippert 693935 replacement reference, 10K trailer axle hub cap, 12K trailer axle hub cap, 15K trailer axle hub cap, aluminum alloy trailer hub cap, magnetic vent plug hub cap, trailer oil level window cap, heavy duty trailer wheel end cap, 1-7/8 deep hub cap
Related Parts & Kits
Check fitment, measurements, and kit contents before ordering. Related parts may not be required for your repair.
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