Gaskets and Seals› O-rings, Grommets and Vacuum Caps
NATIONAL
TRANSMISSION O-RING KIT
SKU: N038 OK1000
Description
These O-rings offer excellent resistance to petroleum-based oils and fuels, as well as water and alcohol. They also provide good resistance to acids and bases, with the exception of those having a strong oxidizing effect. The O-rings can operate within a temperature range of -40 Deg. F to 225 Deg. F (-40 Deg. C to 107 Deg. C).
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | NATIONAL |
| Part Number | N038 OK1000 |
Buy with Confidence
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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