butt stock bolt thread size for a 99

[grizzledmike]

i recently acquired a savage 99 in 303 straight grip its missing a bolt for the butt i figured i make one, is this thread size an odd ball or just something that's come to pass, i guess i could buy one i just thought i could cut the threads on a lathe at work, any one know or is there somewhere that would have all the screw sizes for the 99. thanks

[Mad Dog]

5/16", 22tpi