This is a standard factory fitting  on my Triumph TR4A. It works and is
cheap and easy to replace.

On Friday, August 22, 2003, at 02:32  PM, Automatic digest processor
wrote:

> Subject: Re: Tapping oil drain plug
>
> Hey Arthur,
>
> Your best bet is probably tap larger.  Best solution
> is a 3/8" pipe tap.  It is a tapered tap.  You can get
> a plug from any hardware store.  You will need a pipe
> plug.  Since it is a pipe plug, it tightens the
> farther you screw it in.  It is virtually impossible
> to ever strip again.