What are the markings on a Grade 8 bolt?
Bolt Grade Markings and Strength Chart
| Head Marking | Grade and Material | Mechanical Properties |
|---|---|---|
| Min. Tensile Strength (psi) | ||
| 3 Radial Lines | Grade 5 Medium carbon steel, quenched and tempered | 120,000 |
| 105,000 | ||
| 6 Radial Lines | Grade 8 Medium carbon alloy steel, quenched and tempered | 150,000 |
What do the markings on bolt heads 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.
Is Grade 8 and 8.8 the same?
Is Class 8.8 the same as Grade 8? A: The answer is no. Class 8.8 is not the same as Grade 8.
What grade is a Class 8.8 bolt?
grade 5
It is commonly found in automotive applications. Class 8.8 is similar to grade 5. Zinc plated for moderate corrosion resistance. A tempered medium carbon steel.
Is Grade 8 or 8.8 Stronger?
Table 1.
| Grade/Class | Strength |
|---|---|
| Grade 5 | Medium strength. |
| Grade 8 | High strength. |
| Metric Class 4 | Similar to Grade 2. |
| Metric Class 8.8 | Similar to Grade 5. |
What does P stand for on a bolt?
Phillips
Common Fastener Related Abbreviations
| Abbreviation | Meaning |
|---|---|
| OV | Oval Head |
| P | Phillips |
| PH | Phillips Head |
| Phil. | Phillips Drive |
What does 8.8 stamped on a bolt mean?
So, in English, a Property Class 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of that nominal tensile strength, so 640 MPa.
Is 8.8 high tensile?
Grade 8.8 Bolts
The bottom rung of what many consider high tensile is grade 8.8, sometimes referred to as “structural grade” bolts. They are most often steel and can be plated in many coatings.
What does 8.8 mean on a bolt?
Which is stronger 8.8 or Grade 5?
What does M stand for on a bolt?
metric thread
The letter ‘M’ indicates that this bolt uses a metric thread. The number ‘8’ refers to the nominal diameter of the bolt shaft in millimeters. The number 1.0 is the thread pitch of the bolt, which is the distance between threads, in millimeters. And the final figure, 20, is the length in millimeters.
What size is a 8.8 bolt?
The diameter of the 8.8 Jh Bolt range from 20mm to 100mm. They can come with different finishes as well. The zinc plated, hot dip galvanized and plain finishes are available for different application needs. The 8.8 Metric Bolt is one of the standards adopted.
What is the hardest bolt you can buy?
Grade 8 is the hardest, Grade 5 is medium, and Grade 2 is the softest. This is the most common grade of steel fastener and is the least expensive. Grade 2 bolts have no head marking, although sometimes a manufacturer’s mark is present.
What does F mean on a bolt?
Fully Threaded
In reference to fasteners DIN indicates fasteners that conform to a specific metric standard (will be followed by the standard number). F. Fully Threaded.
Is there a bolt stronger than Grade 8?
Grade 9 bolts are ideal for heavy-duty applications and are also often used in heavy machinery such as bulldozers. Not only are these bolts considerably stronger than they’re grade 8 counterparts, but they are also considerably more resistant to corrosive elements as they are made with yellow zinc chromate.
Are titanium bolts better than steel?
Applications for Titanium Fasteners
The strength and low weight of Titanium make it exceptionally unique, and some grades of Titanium can be anywhere from two to four times stronger than Stainless Steel. These features make Titanium ideal in some aerospace, medical and military applications.
What are the strongest bolt?
BUMAX® Ultra – the world’s strongest bolt
Since its launch in 2014, the BUMAX® Ultra range has proven that it is capable of exceeding tensile strengths of between 1 500 to 1 700 MPa on various applications, with good corrosion resistance and an operating range of between -50 and 400°C.
Is there anything stronger than a Grade 8 bolt?