Mazda MX-5 / Miata NC MT6 Gearbox Shaft Nuts

Genuine Mazda replacement shaft nuts for the Mazda MX-5 NC / RX-8 six-speed MT6 manual transmission. This pair of nuts (Mazda part numbers P501-17-629B and P601-17-628) secures the main and counter shafts within the gearbox and is commonly required when carrying out an MT6 rebuild, bearing plate upgrade, or general gearbox maintenance. Supplied as a pair, genuine Mazda parts.

We do our best to process and ship orders within 1-2 business days (Monday-Friday, excluding holidays). Delivery time depends on location. Below are examples:

UK: 24hrs

Europe: 3-5 days

America and Canada: 5-7 days

Australia: 5-7 days

If you have any questions about your order, you can reach out to our Customer Service team and we will be happy to help.

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If you are not satisfied with one of our products at the time you receive it, or if one of our products does not perform to your satisfaction, please get in touch and we'll make it right. We've been trading for over 2 years and not once had return due to fault or poor quality.