HS4 needle question

[JPSmit]

I'm running an HS4 on my Midget - was the rear off a B

On the collar of the needle there is a "5" that is the only number I can find. From this can anyone tell me the needle size or is there a likely standard size? I can't imagine the needle was ever changed

thanks all

 

[billspohn]

Needle size is #5

 

[JPSmit]

Thanks Bill, but what does that correspond to? the numbers I see listed are more like AAA etc.