Octura flex hex set screw size

[BHChieftain]

Hi,
I have a new Octura Flex Hex coupler for .150 cable. I'm having a hard time figuring out what the set screw hex nut size is-- my standard 1.5mm hex is too small, the 2.0mm hex is too bit, and my smallest 5/64" hex is also too big. What's the magic hex size?

Thanks
-Chief

[m4a1usr]

Uses a standard 6-32 setscrew. I have some couplers that have the SS at 5/32 long while others are the shorter 1/8th long. The hex wrench normaly is 1/16th.

John