This is where we will teach you all about fasteners. Everything from properly measuring a bolt to the different head styles and grade ratings system of metric fasteners. This information can come in handy when you are trying to order a certain size bolt. Giving us the correct size ensures that we send you the right size.
METRIC BOLT MEASUREMENT
Specbolt uses 10.9 grade which meets and usually exceeds motorcycle and ATV manufacturer's specs.
If we want to approximately compare metric grades to U.S. grades, a metric 8.8 is roughly equivalent to a Grade 5. Grade 10.9 is roughly equal to a Grade 8; and 12.9 is roughly equal to a Grade 9. Metric nuts are marked with a single or double numerical symbol (8, 10 or 12). Always match bolts and nuts of comparable grades (use a Grade 8 nut with a Grade 8 bolt; use a metric grade 10 nut with a 10.9 grade bolt, etc.). When dealing with metric fasteners, the 8.8 bolts are similar to a Grade 5. If you need higher tensile strength in metric, stick to 10.9 or 12.9.
The higher the first number, the stronger the bolt in terms of tensile strength. The higher the second number, the longer it will take to enter the yield point.
Note: Metric steel bolts are only required to show a grade mark if they are 6mm and larger and/or are Grade 8.8 or higher. Nuts must be grade labeled if they are Grade 8 or higher.
To ask us about a specific ATV or Motorcycle bolt kit email direct to firstname.lastname@example.org or call us anytime at 770-363-6580.