Description
RA4001 – TRAILER HUB CAP VENT HOLE PLUG
PART NUMBER(S):
Fleet Products: RA4001 (New) | OE: Stemco 359-5990, Meritor A-1205, National 370003A | OES: Automann 180.10617
DESCRIPTION:
Model: RA4001 Trailer Hub Cap Vent Plug
Vehicles: Universal trailer hubs (Fruehauf, Great Dane, Utility, Wabash, Vanguard, and other semi-trailer applications)
• Diameter: 1-1/8" (standard vent hole size)
• Material: High-flex rubber construction
• Color: Red
• Function: Provides venting of trailer hub cap assemblies to regulate pressure, prevent moisture intrusion, and maintain lubrication flow
Applications: Need a reliable replacement for your trailer hub cap vent✔ The RA4001 plug is engineered for Stemco-style 6-hole hub caps and other OEM assemblies. It maintains proper hub pressure, helps prevent contamination, and protects seals for long service life in heavy-duty trailers.
CROSS-REFERENCE(S):
3434001, 359-5990, 3595990, 401199, WA14-5054, 370003A, 380003A, A-1205, 9105S, 8297, 8-297, D0HZ-1A131-A, STM359-5990, 283-110-C, 94-RU-150, MER04000, E04000V, E04000, E-0400, E-04000, 9961-002, 9210300002, Batco 11-0681, Batco 11-622, Automann 180.10617, Automann 180.10627, Martec 20MTR5990, Trailmobile 4131123, SKF 450434, Spicer 8297, Sirco 9015, Fruehauf AXA-1005-1, AXA1005-1, Euclid E-0400, Euclid E-04000, Leland L1701, BWP M-1066, S&S S-B365, Freightliner STM359-5990, World American WA359-5990A cross-reference listing means this part is a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Ensure plug fits snugly into hub cap vent port before releasing vehicle into service.
✔ Replace vent plug whenever signs of cracking, hardening, or oil seepage appear.
✔ Do not overtighten or force into undersized ports; may cause premature failure.
✔ Always inspect hub oil level after plug replacement to confirm proper sealing.
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Warranty Information
