Quote:
Originally Posted by dicklague
Glad you pointed out that bolts are SAE thread and 7/16. I found this out the hard way when I was redoing my roll bar and wanted to weld in a fitting to fasten the roll bar to the "B" pillar. I could not find a metric bolt to fit the threads. I finally went to a speed shop and clerk asked if I was sure it was metric. He said lots of German cars had SAE bolts there because the seat belts were US made.....he was right 7/16 was the size I needed.
I bet it is the only SAE thread on my '73 911!!
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FWIW, worldwide all seat belt bolts are SAE grade 5 (metric grade 8.8) SAE 7/16-20 UNF bolts.
Metric ones may have a metric head with SAE threads.