Description
The 316L Stainless Steel A4-70 Outer Half Threaded Hex Bolt is a high-performance fastener designed for applications that require a combination of strength, durability, and a clean shank for a specific fit. The design, known as an outer hexagon half-tooth bolt, features a partially threaded shank that is ideal for creating a strong, secure, and precise connection. Manufactured according to the precise DIN 931 standard and rated at the A4-70 strength class, this hexagon bolt is built to withstand extreme conditions. Made from low-carbon 316L stainless steel, this bolt offers outstanding corrosion resistance and is ideal for applications where exposure to moisture, chemicals, or other corrosive substances is a concern. This Half Threaded Hex Bolt is ideal for machinery, structural connections, marine projects, chemical equipment, and industrial installations where stability and long service life are essential.
Features & Benefits
- Superior Corrosion Resistance: Made from A4 (316) stainless steel, this bolt offers excellent resistance to rust and corrosion.
- High Strength Rating: The A4-70 strength class guarantees a minimum tensile strength of 700 MPa, providing exceptional holding power.
- Hexagonal Head: The standard hexagonal head design allows for easy installation and ensures that the bolt does not slip while being tightened, providing a secure fit.
- Partially Threaded Design: The half-threaded shank ensures better load distribution and greater thread engagement, providing secure and reliable fastening.
Specification
|
Nominal diameter d |
Thread p |
b |
ds |
k |
s |
|||||
|
L≤125 |
125≤L≤200 |
200≤L |
max |
min |
max |
min |
max |
min |
||
|
M4 |
0.7 |
14 |
20 |
33 |
4 |
3.7 |
3 |
2.6 |
7 |
6.64 |
|
M5 |
0.8 |
16 |
22 |
35 |
5 |
4.7 |
3.24 |
2.76 |
8 |
7.64 |
|
M6 |
1 |
18 |
24 |
37 |
6 |
5.7 |
4.24 |
3.76 |
10 |
9.64 |
|
M8 |
1.25 |
22 |
28 |
41 |
8 |
7.64 |
5.54 |
5.06 |
13 |
12.57 |
|
M10 |
1.5 |
26 |
32 |
45 |
10 |
9.64 |
6.69 |
6.11 |
16 |
16.57 |
|
M12 |
1.75 |
30 |
36 |
49 |
12 |
11.57 |
7.79 |
7.21 |
18 |
18.48 |
|
M14 |
2 |
34 |
40 |
53 |
14 |
13.57 |
9.09 |
8.51 |
21 |
21.16 |
|
M16 |
2 |
38 |
44 |
57 |
16 |
15.57 |
10.29 |
9.71 |
24 |
23.16 |
|
M18 |
2.5 |
42 |
48 |
61 |
18 |
17.57 |
11.85 |
11.15 |
27 |
26.15 |
|
M20 |
2.5 |
46 |
52 |
65 |
20 |
19.48 |
12.85 |
12.15 |
30 |
29.16 |
|
M22 |
2.5 |
50 |
56 |
69 |
22 |
21.48 |
14.35 |
13.65 |
34 |
33 |
FAQs:
Q1: Why choose a Half Threaded Hex Bolt (DIN 931) over a Fully Threaded Bolt (DIN 933)?
A: A Half Threaded Hex Bolt is preferred when the strongest part of the joint is the unthreaded shank. The partially threaded design ensures the smooth portion bears the shear stress, allowing for a more precise and stronger fit in structural applications.
Q2: What is the benefit of the A4-70 rating?
A: The A4-70 rating ensures quality. 'A4' indicates the use of 316 (or 316L) stainless steel, and '70' signifies a high minimum tensile strength of 700 MPa, making this fastener suitable for high-stress connections.
Q3: Why choose 316L stainless steel?
A: 316L offers exceptional corrosion resistance—superior to 304—making it ideal for environments with saltwater, chemicals, and high humidity.
Q4: Where are half threaded bolts used?
A: They are commonly used when a combination of tension and shear strength is required, such as machinery installations, structural frameworks, and marine hardware.
Q5: Are these bolts compatible with standard nuts and washers?
A: Yes. They are manufactured to DIN 931, ensuring compatibility with standard A4 stainless steel nuts and washers.
