How much does a nock, an insert, and Blazer vanes weigh?

Depends on the maker on the nock and insert, the gold tip nocks 12gr, the inserts 15gr. and I shoot feathers but I think the blazersare around 5gr. ea.
You can most likely get the exact info at the website of which ever product you are using, that is where I got the weights for the GoldTip's..
and I failed to mention that those #'s were for the 7595's. They might be different for a different manufacturer.

Thats close enough for what I am doing, thanks.

Blazers are 6 and the nocks and inserts will vary alot as to which maker you use, for example easton nocks for mine are at 9 gr.