Description
The 2507 Duplex Steel GB5783 Hex Flat Head Bolt is a high-performance fastener engineered for applications requiring exceptional strength, durability, and corrosion resistance. Manufactured from 2507 super duplex stainless steel and produced to the strict requirements of the GB5783 standard, this bolt features a precision-cut flat head and a robust hexagonal drive for secure installation.
Its flat head profile ensures a flush, clean finish against mounting surfaces, making it ideal for environments where a low-profile design is essential. With its full-threaded body and superior mechanical properties, this Hex Flat Head Bolt is widely used in marine engineering, chemical processing, offshore oil & gas, desalination plants, and other highly corrosive or high-stress applications.
Features & Benefits
- High Strength: The 2507 Duplex Stainless Steel boasts a yield strength of 800-1000 MPa, which is twice the strength of conventional austenitic stainless steel, offering better mechanical performance.
- Corrosion Resistance: Offers excellent resistance to both pitting and stress corrosion, making it ideal for demanding environments like chemical plants and coastal regions.
- Flat Head Profile: The flat head design allows for a smooth finish against surfaces, ensuring a flush fit when installed. This feature is useful in applications where a low-profile fastening is needed.
- Thread Precision: Spiral threads are meticulously designed for deep, uniform engagement, offering a tight fit and reducing the risk of the bolt locking during use.
Specification
|
d |
M3 |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
M14 |
M16 |
||
|
e |
min |
Grade A |
6.01 |
7.66 |
8.79 |
11.05 |
14.38 |
17.77 |
20.03 |
23.36 |
26.75 |
|
Grade B |
5.88 |
7.5 |
8.63 |
10.89 |
14.2 |
17.59 |
19.85 |
22.78 |
26.17 |
||
|
k |
Nominal name |
2 |
2.8 |
3.5 |
4 |
5.3 |
6.4 |
7.5 |
8.8 |
10 |
|
|
Grade A |
min |
1.875 |
2.675 |
3.35 |
3.85 |
5.15 |
6.22 |
7.32 |
8.62 |
9.82 |
|
|
max |
2.125 |
2.925 |
3.65 |
4.15 |
5.45 |
6.58 |
7.68 |
8.98 |
10.18 |
||
|
Grade B |
min |
1.8 |
2.6 |
3.26 |
3.76 |
5.06 |
6.11 |
7.21 |
8.51 |
9.71 |
|
|
max |
2.2 |
3 |
3.74 |
4.24 |
5.54 |
6.69 |
7.79 |
9.09 |
10.29 |
||
|
s |
Grade A |
min |
5.5 |
7 |
8 |
10 |
13 |
16 |
18 |
21 |
24 |
|
max |
5.32 |
6.78 |
7.78 |
9.78 |
12.73 |
15.73 |
17.73 |
20.67 |
23.67 |
||
|
Grade B |
min |
5.2 |
6.64 |
7.64 |
9.64 |
12.57 |
15.57 |
17.57 |
20.16 |
23.16 |
|
|
max |
5.5 |
7 |
8 |
10 |
13 |
16 |
18 |
21 |
24 |
||
FAQ:
Q1: Why is this fastener referred to as a "Hex Flat Head Bolt"?
A: This fastener has a flat head profile that allows it to sit flush with the surface, and it uses a hexagonal system for driving. This combination of features makes it ideal for applications requiring both high strength and a low-profile finish.
Q2: How does 2507 Duplex Steel enhance the bolt's performance?
A: The 2507 Super Duplex material provides immense strength, boasting a yield strength that is twice that of standard stainless steel, while also offering excellent resistance to pitting and stress corrosion.
Q3: Does the flat head design affect performance?
A: No. The flat head offers a low-profile appearance while maintaining excellent structural strength and reliable clamping force.
Q4: Are these bolts suitable for high-temperature applications?
A: Yes. 2507 duplex stainless steel maintains structural stability across a wide temperature range and performs well under thermal stress.
