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"Grades" of bolts (August 7, 2009)
"Grades" of bolts,American fractional bolts,Grade 2,Grade 5,Grade 8,grade bolt,Metric fasteners,number grades
To expand on what Dangerdan said about "Grades" of bolts, American fractional bolts are:
Grade 2= soft, household use (no marks on head)
Grade 5= standard, automotive use (3 slashes on head)
Grade 8= case hardened, for critical & extreme use (6 slashes on head)
It's very important not to replace a better with a lesser grade bolt, especially on a bike or cage (could be hazardous to your health & body)
Metric fasteners also have various "Grades". They normally have number grades stamped on the heads.
Just wanted to be sure everyone knows that "All Bolts Are NOT The Same".
Had a brother just about get seriously hurt because he was not aware of this.
