For mechanical details, you should search the internet for typical specs for SMA connectors. Note that there may be several specs for different forms of connectors.
A) Since you haven't identified the u-blox product, it's hard to guess what kind of SMA you have.
B) I'm not aware of u-blox production products that include SMA connectors. If you have an EVK, those are evaluation units not intended for production use hence mechanical specs and datasheets are not applicable - use EVKs at your own risk.