kco
Veteran Member
My MK Martin 75" snowblower specifies different grades for bolts. The auger shear bolt is a 5/16" grade 2 while the Italian made Comer driveshaft which powers the blower and auger is a 10mm class 8.8. Metric 8.8 is similar to SAE grade 5 while metric class 10.9 is similar to SAE grade 8.
The metric class rating gives the actual tensile and yield strength for the steel as shown here:
Metric Class 8.8 Hexagon Bolts & Nuts 12mm AF
The metric class rating gives the actual tensile and yield strength for the steel as shown here:
Metric Class 8.8 Hexagon Bolts & Nuts 12mm AF