Starter Problem

No u cant see the threaths and the starter is boldet in right, the gold one is just a washer, what i forgot to mention that when i tried on my other starter wich one is remove from the car i put a ground cable from the battery (-) to the starter and a (+) cable from the battery plus to the starter motor and then the starter cames out, but with the starter installed i tried the same manytimes and that didnt work, just when i installed the starter with the battery and starter relay ect.. i turned the key and it starts, thats why i used a srewdriver to see how far the starter cames out