What does 10.9 in bolt mean?

Property Class 10.9 bolts and screws have a minimum tensile strength of 1040 MPa for all sizes. As you can see, they're slightly stronger than the nominal value in the property class designation. Property Class 10.9 bolts are considered high-strength parts. They're in the neighborhood of SAE J429 Grade 8 parts.

What does 12.9 mean on a bolt?

In metric classes, bolts that have been graded as 12.9 have the highest strength. In comparison to grade 8.8, the strength of Grade 12.9 Bolts is very high, where their minimum ultimate tensile strength is valued as high as 1242 Mpa. These fasteners are renowned for having a high tensile strength.

Is Grade 8 or 12.9 stronger?

Used in high stress environments, grade 12.9 fasteners are the highest class of metric cap screws. Where Grade 8 fasteners have a 150,000 psi tensile strength, 12.9 fasteners have a 180,000 psi tensile strength, making them more durable than the grade 5.

Is 10.9 steel good?

Grade 10.9 steel: Fasteners made from a grade 10.9 consist of a higher strength alloy steel and which has a tensile strength of 1000 MPa. The highest, most common strength carbon steel available. This grade of steel is required for high strength and reliability projects.

Is Grade 8 or 8.8 stronger?

The similarity in names is purely coincidental and the Metric Class 8.8 is not as strong as the Inch Grade 8. As you can see from the table below, a metric Class 8.8 is the equivalent of a Grade 5, not a Grade 8.

Bolt grade explained

Are 10.9 bolts brittle?

For most applications, property class 10.9 fasteners gives the best compromise between strength and brittle fracture risk.

Is Grade 8 or 10.9 stronger?

They are very similar. Grade 8 is an SAE designation. 10.9 is a metric designation. But the two systems yield the same holding strength.

What is a 10.9 equivalent to?

Class 10.9

This is a metric grading similar to the SAE grade 8 classification, which is used in automotive, and structural industries, as well as in high temp applications. Its strength is near the high end of the grade scale, although there are higher grades and strengths for more specialized fasteners.

What is the strongest grade bolt?

A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5.

What is the highest grade of bolts?

These grades start at grade 2 and go up to grade 8, which is the strongest SAE American Grade bolt available.

How strong is a 10.9 bolt?

The High Tensile Grade 10.9 Screw is a special type that does not need nuts to fix it onto other components. This grade of bolts have tensile strength upto 1040 minimum and yield strength up to 940MPa minimum. The Grade 10.9 Stainless Steel Bolt Material Properties make them applicable in engine parts and components.

Will Grade 10.9 bolts rust?

These Carbon Steel 10.9 Bolts are also resistant to corrosion and therefore are used in a wide range of industrial applications such as for construction. These fasteners also have excellent finishing and are easy to install, and are also robust.

Is 10.9 equivalent to Grade 8?

Grade 8 according to SAE J429 has a minimum ultimate tensile strength of 150 ksi, which is equivalent to 1040 MPa, which is the minimum ultimate tensile strength of 10.9 fasteners according to ISO 898-1.

What is the shear strength of a 10.9 grade bolt?

10.9 grade Socket Button heads in UNF, UNC and Metric.

These are rated at 145,000psi (1000MPa) tensile strength, 62,100 (428MPa) shear strength.

What size is a 10.9 bolt?

Class 10.9 flange bolts have a diameter of around 10.9mm and are considered hardened, providing a high strength, high tensile fastening solution.

Why are 12.9 bolts black?

Hydrogen embrittlement is likely to occur after electro-galvanizing after tightening, so bolts above 10.9 are usually not galvanized, and the surface treatment is usually blackened or hot-dip galvanized.

What is the hardest grade bolt you can buy?

Steel fasteners are commonly available in four grades that are broken into the following categories: 2, 5, 8 and 18-8 stainless (commonly referred to simply as alloy steel). Grade 8 is the hardest, Grade 5 is medium, and Grade 2 is the softest.

What is the difference between 8.8 and 10.9 bolts?

Grade 10.9 bolts are often used in critical or safety-sensitive applications where strength and reliability are vital. Grade 8.8 bolts are suitable for general-purpose applications.

What do letters on bolts mean?

The markings on the heads of bolts serve two different purposes: The markings can indicate who manufactured the bolt. This will vary from manufacturer to manufacturer, but is usually one, two or three characters. The markings can identify the standard to which the bolt was made.

What nut to use with 10.9 bolt?

High tensile bolts are usually graded 10.9 and 12.9 (these are popular varieties) and you can match a grade 10 nut and grade 12 nut with these units respectively. You can, however, replace lower grade nuts with higher grade ones without fear of breakage and thread stripping.

What is the price of 10.9 grade bolt?

Mild Steel High Tensile Bolts 10.9 Grade, For Industrial, 100 at Rs 27/piece in Mumbai.

How much weight can a Grade 10.9 bolt hold?

From the table at right, for a strength class of 10.9 and a maximum allowable load of 200 kgf, the suitable bolt is a 318［kgf］M8.

What is the difference between a 10.9 and 12.9 bolt?

Tensile strength of a bolt is the amount of force a bolt can withstand when it is being stretched without being deformed. Yield strength is the maximum load without permanent deformation. A 12.9 has a rating of about 175000 to 180000 psi tensile strength and is about 20-25% stronger than 10.9.

What grade is a zinc bolt?

Zinc plating creates corrosion resistance and gives the bolts a shiny finish. Zinc plated alloy steel is most often available in Grade A, Grade C, Grade 2, Grade 5 and Grade 8.