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Description
STEMCO typically identifies a matched combination of wheel bearings + hub seal (sometimes called a seal set). [stemco.com]
These sets are used in wheel end assemblies (hub, bearings, seal) on Class 7–8 trucks and trailers.
What’s usually included (typical SET kit)
While exact contents vary by application
Inner & outer wheel bearings
Matching hub seal (often Grit Guard® / Discover® style depending variant)
Sometimes associated components (race references, depending catalog)
Application
Heavy‑duty drive / trailer axle hubs
Cross‑referenced in STEMCO catalogs by axle type and bearing combination
Axle manufacturer (Meritor, Dana, Hendrickson, etc.)
Bearing numbers (e.g., HM212049/HM212011 style combos)
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