I think your on the right track for the extra stud fur sur.
Also, i feel like "grade 8" dosen't transfer over to metric. I think they are on different scales essentially making a metric 10.2 the same rating as a std 8. Don't hold me to that. and as far as Taiwanese metal, whatever, they are newer stronger and easily available as a kit( lets not start that crap)
did a lil research today check it out.
I think everything i looked at. Has told me that the strength ratings are the same. (the grade that was marked on the Trail-Gear diff studs is 10.9)
Metric Fastener strength chart-
http://euler9.tripod.com/bolt-database/22.html Scroll down
Standard fastener strength chart -
http://www.americanfastener.com/technical/grade_markings_steel.asp Scroll down
CONVERSION Calc. for MPa(metric) to Psi(standard) -
http://www.chapelsteel.com/mpa-psi.htmlAmerican Grade 10.9 Minimum tensile strength 150,000 Psi
Metric Grade 10.9 Min. tensile strength 1040 MPa converts to 150,839.208 Psi
