Deck spindle thread count

[bo dawg 516]

I need to try and clean the threads up on the deck spindle ends for the blade nut. What are the specs to get the correct die?  

[Lee1977 6,649]

Deck spindles are fine tread  3/4" - 16 on the blade.  the top can be 3/4" - 16  or 5/8" - 18 if it's a metric spindle.

[8ntruck 6,993]

Depends on the spindle, as both metric and inch sized shafts were used over the years.