Roger-I believe that you have read something into my posts that either you either misread or I wrote poorly----when I wrote rule of thumb that that there should be 1 1/2 times bolt diameter for depth of hole it applies to where you have the plate threaded-you said 3/16 plate, 1/4 in bolt------the thumb rule for a thread hole for your 1/4 bolt would be 3/8 inch--in mild steel plate that would really be overkill, however with your 3/16 plate it is questionable. and in the top of your frame which you posted as 1/8 (edited later) you are way below specs---not that your work on this is unacceptable(as it is a hood latch) but you are way off base on what should be used as a standard in some more critical areas. I couldn't find my Machinists Handbook but did find reference online and posted it--the info there does support the fact that with the bolt/nut ratings out there that the thickness of the SAE nuts are suffient for the diameter of the bolts they fit.


And I believe that no matter what you choose to do on your car with stuff you fab from scratch, it is the responsibility of others to post when the methods you or others choose ar inadequate for the public safety of others on our highways. I know that we have views of many things that don't alighn with the planets of internet universe, but I humbly believe that as a member on here with a long road that I've been down, I should pass on any info I have that can help others-------------- With that said I am going to check the ignore button on your threads, as it seems that somewhere we have come to an quagmire that you can't/won't accept any thing I say----------