Question: What Is The Difference Between A 10.9 And 12.9 Bolt?

What is the meaning of 10.9 grade in a bolt?

Grade 10.9 metric bolts are manufactured using medium carbon steel, medium carbon steel alloy and low carbon boron steel that has been quenched and tempered.

Used in automotive applications and for bolting large and forged parts, metric 10.9 bolts exhibit high tensile strength and good wear resistance..

Is a 12.9 Bolt stronger than Grade 8?

Because there are so many different grades and fasteners all look about the same, medium carbon and alloy steel strength grades are marked for identification….Table 1.Grade/ClassStrengthMetric Class 10.9Similar to Grade 8.Metric Class 12.9The highest metric class for strength, it exceeds Grade 8.12 more rows

What is the hardest bolt you can buy?

BUMAX® Ultra has proven itself as the world’s strongest bolt – in various highly-demanding critical fastener applications around the world where standard fasteners are simply inadequate.

What grade bolt has the highest shear strength?

They are commonly used at high stress points in connecting devices.12.9 Bolts. A 12.9 bolt is one of the highest grade of bolts produced. … 12.9 Shear Strength. The minimum tensile strength of a 12.9 bolt is 1220 MPa.

How strong is a grade 8.8 bolt?

Mechanical propertiesGrade, material & conditionNominal thread diameter size range [mm]Tensile strength (min) [MPa]Class 5.8 Low or medium carbon steel; cold worked5–24520Class 8.8 Medium carbon steel; quench and temperedUnder 16 (inc.)80017–72830Class 8.8 low carbon Low carbon boron steel; quench and tempered9 more rows

What does 12.9 on a bolt head mean?

The minimum ultimate tensile strength of the Grade 12.9 Metric Hex Head Bolts is about 1242 Mpa or 180,000 PSI, making them the highest grade of bolts produced.In fact, the Grade 12.9 Nuts is known for their high tensile strength.

Is Grade 8 or 10.9 stronger?

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 strong is a grade 10.9 bolt?

The yield strength of the Class 10.9 Bolt is 940 Mpa and the tensile strength of the Grade 10.9 Nuts is 1040 MPa.

What Bolt is the strongest?

The strongest commercial-quality bolt is grade 8, marked by six raised dashes; its medium-carbon alloy steel has been quenched and tempered to achieve a tensile strength of 150,000 psi.

What is the difference between 8.8 and 12.9 grade bolts?

The mechanical difference between the 12.9 and 8.8 is yield strength (roughly 90% of 1200 MPa vs 80% of 800 MPa). That means the 12.9 can be stretched further (i.e. torqued to some higher value) before it yields, which of course increases the clamp force.

What are 12.9 bolts made of?

Alloy steelThe 12.9 is the Class head marking under ASTM F568M standard for Bolts of a high grade (1220 MPa), being Alloy steel, quenched and tempered. ASTM F568M is an ASTM International standard for metric bolts, screws and studs that are used in general engineering applications.

How can you tell if a bolt is Grade 5?

Grade 5 bolts are case hardened, meaning the bolt has been heated enough to hardened the outside of the bolt but not enough to harden the inside portion. Grade 5 bolts are identified by 3 evenly spaced radial lines on the head.