size of flexplate to converter bolts??

Lost mine.
One source says 5/16-24 but I also need the length.
They go on without washers?

Thanks

Depends on what convertor you have , stock or a high performance unit , everything but hemi had a 5/16-24 , hemi was a 7/16-20' some performance convertors could have the hemi hardware. They are short and have a short head , you need to buy torque converter bolts , hardware store bolts have too tall a head. But yes, no washer and put blue loctite on the threads.

Ditto on the blue Loc Tite.