What is the meaning of 8.8 grade in a bolt?

What is the meaning of 8.8 grade in a bolt?

Grade 8.8 high tensile steel is often referred to as the structural grade for bolts. It is the most common form of high tensile material and is usually stocked in plain finish or zinc. It can be plated in many other coatings.

Is Grade 8 and 8.8 the same?

Q: I’m specifying the strength of a metric fastener and need your help. Is Class 8.8 the same as Grade 8? A: The answer is no. Class 8.8 is not the same as Grade 8.

How much weight can a 8.8 bolt hold?

Similarly a grade 8.8 bolt will not snap until it is carrying a load of 80kg per square millimetre.

Are high tensile bolts stronger?

Bolt grades are closely related to tensile strengths. In layman’s terms, the tensile strength of a bolt refers to the maximum stress the bolt can withstand before breaking. Thus, the higher the tensile strength, the higher the weight a bolt can sustain and the higher its capacity to bear impact.

How hard is a 8.8 bolt?

Class 8.8 is hardened, but it is not as strong as class 10.9. It is commonly found in automotive applications. Class 8.8 is similar to grade 5. Zinc plated for moderate corrosion resistance.

Is Grade 8 or 8.8 Stronger?

In terms of strength, 8.8 is equivalent to Grade 5, 10.9 is equivalent to grade 8. There are also 12.9 metric bolts, which are a little stronger than 10.9, and are a higher alloy steel.

What’s the strongest grade bolt?

grade 8
Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI.

What is the difference between 8.8 and 10.9 bolts?

Class 10.9 is stronger than class 8.8. It is commonly found in high strength automotive applications. Class 10.9 is similar to grade 8. A low carbon steel for general use.

How can you tell if a bolt is high tensile?

Imperial Grades They both use numbers to grade their bolts – the higher the number, the higher the tensile strength. For instance, the SAE system covers diameters of up to 1 ½ inch, and a grade 8 would have a higher tensile strength than a grade 5.