This is the Hollow Nut for use with Sun Super Tach Cups & Brackets.

Sun did not provision a hole in their Super Tach cups, so all wiring must come out this Hollow Nut.

This Nut is NOT for the Super Tach II with their plastic integrated cup series of tachometer.  

Those use a plastic nut, which screws directly into the cup.

New Condition.

The curved threaded plate in the last photo is just for illustration... it is not part of this listing.

I am happy to combine shipping.

Thanks for looking and Good Luck, Pete