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Beginner — under 30 min
Overview
This seal has a housing bore of 6.250 inches and an outside diameter of 6.263 inches. The shaft diameter is 4.250 inches, and the width is 1.188 inches. It is rated for a temperature range of -100°F to 450°F (-73°C to 232°C) and includes a triple barrier contamination system for enhanced dirt exclusion. Installation requires tool RD313.
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Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | NATIONAL |
| Part Number | N038 380031A |
About MOTORMIA
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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