1/2" Male threaded models: Are intended to be used with SHURflo Swivel Barb Fittings which seal with an internal taper when hand tightened.
That's why Shurflo recomend the use of their fittings for use with the their pumps. We sell a range of shurflo fittings designed for easy reliable connection, they seal to the pump without force and in most cases can be done up without the use of tools, now thats handy!
Of course there are other reasons for thread damage however, this does occur and creates great disappointment and frustration for the new owner who's just putting the new pump on the sprayer to start using.
Hope this is a helpful hint, until next time happy farming...