Description
RA4021 – FRUEHAUF HUB CAP O-RING
PART NUMBER(S):
Fleet Products: RA4021 (New) | OE: Automann 180.10618.1, Euclid E-05500, Meritor R005500
DESCRIPTION:
Model: Fruehauf Hub Cap O-Ring
Vehicles: Fruehauf Pro-Par trailers, GMC, Mack, Wabash, and other heavy-duty hubs using threaded hub caps (RA4020, 180.10618, 180.10621)
• Type: Hub Cap O-Ring Seal
• Bolt Circle Compatibility: 5.5" typical for 6-hole hub caps
• Cross-section Size: Fits standard 6.25" threaded hub caps and screw-in style Fruehauf caps
• Material: High-grade elastomer/rubber compound
• Function: Provides a tight, leak-proof seal between hub cap and wheel hub to retain lubricant and prevent contamination
• Weight: 0.03 lbs
• Application Type: Oil or grease-filled wheel hub systems
Applications:
Designed as the OEM-style sealing O-ring for Fruehauf spin-on hub caps and compatible Automann and Stemco hub cap assemblies. Ensures a reliable seal for threaded hub caps in trailer and truck axle applications, preventing leaks and extending wheel-end service life.
CROSS-REFERENCE(S):
RA4021, 180.10618.1, E-05500, E05500, R005500, 8235-R005500, ATIR005500, AXA04841, AXA 000484 001, Euclid E05500, Fruehauf AXA04841, Meritor R005500, Spicer 8296, GT4021, GL9014, L-1700, L1700, M-1065, M1065, NAT357, WA145001, 11-0680, 203-3077, 2033077, 3099695, 3096286, 8235-R005500, 8-296, 05500, 401551, 401265, 61077G, 7843-3303077, 719021, 9014, SIR9014, TDA R005500, TDAR005500, TP1549, U51L1700, MNC203-3077, STE3303077, 3303077, 3303077-ST, SM-330-3077, STM3303077, ZCP3303077, SBR330-3077, ST330-3077, STE330-3077, TWD3303077, AXA04321, GL-4974, PA10231, J27954, NAT-357, 130759, ROS18005006, 180106181, 18003006, 18005006, G473, 180.10618.1P, 180.CR453795-8A cross-reference listing means this part is a suitable replacement for the part numbers listed. Always confirm hub cap model and gasket size before installing.
IMPORTANT INSTALLATION NOTES:
✔ Confirm O-ring matches hub cap model (RA4020 or 180.10618) before use.
✔ Always install with clean, lubricated surface for proper sealing.
✔ Do not over-tighten hub cap when O-ring is seated to prevent deformation.
✔ Inspect for cuts, cracks, or flattening during routine hub service.
✔ Replace O-ring whenever the hub cap is removed to maintain optimal sealing.
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Warranty Information
