I'm not sure I understood your question.
It is a 17mm hex.
bmc  :)
"Faith will move mountains, but you'd better bring a shovel...."

> From: Clive Smith <clive.harman-smith@NTLWORLD.COM>
> Reply-To: Clive Smith <clive.harman-smith@NTLWORLD.COM>
> Date: Tue, 3 Sep 2002 22:58:14 +0100
> To: vanagon@GERRY.VANAGON.COM
> Subject: Gearbox drain plug
>
> Can anyone tell me if this likely to blanked off as standard, Does not seem to
> be a female hex socket, but a plain round insert with no way of removing it.
>
> Thanks.
>
> Clive
>
> '88 Syncro Transporter
>