Deck Hatch Hinge Bolts

[frwgt350net]

Does anyone know the correct size and thread - I can't seem to get any of my taps to fit

 

[AeroCoupe]

What year is the car? You got give us more info.

 

[frwgt350net]

What year is the car? You got give us more info.

My mistake - the car is a 1986 Mustang GT hatchback - the replacement hactchback is fram a 1991 GT hatchback - I'd like to run a tap through the hindge threads - the size appears to be 1/4" both both fine and course threaded taps are not wanting to thread in by hand and I sure don't want to f it up by forcing it through.