[LouG68]

Does any one know the fill plug size and threads for the Spicer Titan rear cover?
Of course my ratchet is rounding the removal insert square from taking it off and putting it back on. I'd like to get a new filler bolt... maybe a better one if anyone knows of a brand. But I do need the size to replace it.
The cover is a Spicer # 2016951 and was a kit with the cover, bolts and filler plug

thanks my friends... this one is a tough one for me to pin down

 

[Chasespeed]

I won't guess as to size, but, I'm willing to bet, its most likely a pipe plug.
They're most common in diff covers in 3/4 and 1" NPT.