Somehow it didn't sound right. The screws are indeed 6mm. Now I feel dumb. 

Karl Wolz
Sent from my electronic umbilicus

> On Jan 30, 2016, at 10:41 PM, Dennis Haynes <d23haynes57@hotmail.com> wrote:
> 
> McMaster Carr has most anything. For M4 I am only familiar with .7 and .75
> pitch. M6 is available in 1.0, .75, and .5.
> 
> Dennis
> 
> 
> 
> 
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Karl Wolz
> Sent: Saturday, January 30, 2016 11:51 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Looking for 4mm by 1.0 threads per mm tap
> 
> All I've found are finer threads. This is for the windshield wiper assembly.
> Any ideas?  Tried HF and Sears and Home Depot. They all have finer thread
> taps. 
> 
> Karl Wolz
> Sent from my electronic umbilicus