National Wheel Seal For Trailer Axles Refrigerant Type: R134a 73040 5 Refrigerant Type: R134a Shaft Length: 2 National 370065A is a trailer axle wheel seal (4 The seal sits at the inboard wheel bearing of standard TN and TP trailer axle wheel ends and is interchangeable across the "Scotseal family" per SKF's published interchange
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