Striped rear brake bleeder valve entry

So I was bleeding the rear brake and tightend the valve a little too much and now keeps spinning, dont know what to do, its not too bad using the fronts but stopping power is just not the same, not to mention not being safe in the city traffic...anyone ever come across this? Or know of a thread I can refer to?

I found this on the internet:

www.narleychoppers.com/servlet/Detail?no=135908&source=googleps

Is that a universal fit? Or only for harleys?

I don't know, and I've never used them so I cannot say how well they work, but it may be worth contacting them to see what size it is and then determine if that will work in your caliper. Ed

Find the thread of the original bleeder, say 6 x 1.25mm, and then go looking for the next over size at the Auto Store or a wrecking yard even. Say 8x 1.25mm then tap it with a Bottoming Tap. Done.
You should disassemble and clean it at least, preferably put a kit in it.