DIN961 EN ISO8676 Carbon Steel Hexagon Head Bolts With Fine Pitch
Thread Grade4.8,6.8,8.8 Color-Plated Zinc
Advantages:
- High Strength: Due to the fine pitch design, the bolt can disperse the force
over a smaller contact area, thus increasing the strength per unit
area.
- High Precision: The fine pitch thread allows for a tighter fit between the bolt
and nut, providing higher assembly precision.
- Excellent Sealing Performance: The close fit of the fine pitch thread reduces gaps, resulting in
superior sealing capabilities, especially suitable for sealing
applications.
- Easy Assembly: The hexagon head design makes the bolt easier to manipulate with
tools such as wrenches or screwdrivers during assembly and
disassembly.
Characteristics:
- Fine Pitch Design: As mentioned, the fine pitch thread is the primary characteristic
of this bolt, providing the aforementioned advantages.
- Hexagon Head: The hexagon head design ensures stability during operation and
easy rotation with tools.
- Good Interchangeability: Following unified international standards, these bolts have good
interchangeability, making it convenient for users to select and
replace them.
Applications:
- High-Precision Equipment: Due to the high precision and excellent sealing performance of
fine pitch bolts, they are often used in equipment requiring
precise connections, such as precision instruments and aerospace
equipment.
- Vibration Environments: Fine pitch bolts' high strength and superior locking performance
make them suitable for applications subject to vibration and
impact, such as automobiles, motorcycles, and ships.
- Sealing Applications: The tight fit of fine pitch bolts makes them particularly
suitable for sealing applications, such as pipelines and fuel
tanks.
In summary, Hexagon head bolts with fine pitch thread, with their
high strength, high precision, excellent sealing performance, and
ease of assembly, have found widespread applications in various
scenarios requiring precise connections and sealing.
![](http://img.everychina.com/nimg/9f/82/db6ff9f92b621f8acf9ef4a1361a.jpg)
Screw Thread | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 |
d | | | | | | | | | |
P | Pitch | Fine thread-1 | 1 | 1 | 1.5 | 1.5 | 1.5 | 2 | 1.5 | 2 | 2 |
Fine thread-2 | - | 1.25 | 1.25 | - | - | 1.5 | 2 | 1.5 | 1.5 |
a | max | 3 | 3.75 | 4.5 | 4.5 | 4.5 | 6 | 6 | 6 | 6 |
c | min | 0.15 | 0.15 | 0.15 | 0.15 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
max | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
da | max | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 20.2 | 22.4 | 24.4 | 26.4 |
dw | Grade A | min | 11.6 | 15.6 | 17.4 | 20.5 | 22.5 | 25.3 | 28.2 | 30 | 33.6 |
Grade B | min | 11.4 | 15.4 | 17.2 | 20.1 | 22 | 24.8 | 27.7 | 29.5 | 33.2 |
e | Grade A | min | 14.38 | 18.9 | 21.1 | 24.49 | 26.75 | 30.14 | 33.53 | 35.72 | 39.98 |
Grade B | min | 14.2 | 18.72 | 20.88 | 23.91 | 26.17 | 29.56 | 32.95 | 35.03 | 39.55 |
k | Nominal Size | 5.3 | 6.4 | 7.5 | 8.8 | 10 | 11.5 | 12.5 | 14 | 15 |
Grade A | min | 5.15 | 6.22 | 7.32 | 8.62 | 9.82 | 11.28 | 12.28 | 13.78 | 14.78 |
max | 5.45 | 6.58 | 7.68 | 8.98 | 10.18 | 11.72 | 12.72 | 14.22 | 15.22 |
Grade B | min | 5.06 | 6.11 | 7.21 | 8.51 | 9.71 | 11.15 | 12.15 | 13.65 | 14.65 |
max | 5.54 | 6.69 | 7.79 | 9.09 | 10.29 | 11.85 | 12.85 | 14.35 | 15.35 |
k1 | min | 3.54 | 4.28 | 5.05 | 5.96 | 6.8 | 7.8 | 8.5 | 9.6 | 10.3 |
r | min | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.8 |
s | max=nominal size | 13 | 17 | 19 | 22 | 24 | 27 | 30 | 32 | 36 |
Grade A | min | 12.73 | 16.73 | 18.67 | 21.67 | 23.67 | 26.67 | 29.67 | 31.61 | 35.38 |
Grade B | min | 12.57 | 16.57 | 18.48 | 21.16 | 23.16 | 26.16 | 29.16 | 31 | 35 |
Weight of per 1000 steel products(≈kg) | | | | - | - | - | - | - | - | - | - | - |
Screw Thread | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 |
d | | | | | | | | | |
P | Pitch | Fine thread-1 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 |
Fine thread-2 | - | - | - | - | - | - | - | - | - |
a | max | 6 | 6 | 6 | 9 | 9 | 9 | 9 | 9 | 9 |
c | min | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
max | 0.8 | 0.8 | 0.8 | 0.8 | 1 | 1 | 1 | 1 | 1 |
da | max | 30.4 | 33.4 | 36.4 | 39.4 | 42.4 | 45.6 | 48.6 | 52.6 | 56.6 |
dw | Grade A | min | - | - | - | - | - | - | - | - | - |
Grade B | min | 38 | 42.7 | 46.6 | 51.1 | 55.9 | 59.9 | 64.7 | 69.4 | 74.2 |
e | Grade A | min | - | - | - | - | - | - | - | - | - |
Grade B | min | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 71.3 | 76.95 | 82.6 | 88.25 |
k | Nominal Size | 17 | 18.7 | 21 | 22.5 | 25 | 26 | 28 | 30 | 33 |
Grade A | min | - | - | - | - | - | - | - | - | - |
max | - | - | - | - | - | - | - | - | - |
Grade B | min | 16.65 | 18.28 | 20.58 | 22.08 | 24.58 | 25.58 | 27.58 | 29.58 | 32.5 |
max | 17.35 | 19.12 | 21.42 | 22.92 | 25.42 | 26.42 | 28.42 | 30.42 | 33.5 |
k1 | min | 11.7 | 12.8 | 14.4 | 15.5 | 17.2 | 17.9 | 19.3 | 20.9 | 22.8 |
r | min | 1 | 1 | 1 | 1 | 1 | 1.2 | 1.2 | 1.6 | 1.6 |
s | max=nominal size | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
Grade A | min | - | - | - | - | - | - | - | - | - |
Grade B | min | 40 | 45 | 49 | 53.8 | 58.8 | 63.1 | 68.1 | 73.1 | 78.1 |
Weight of per 1000 steel products(≈kg) | | | | - | - | - | - | - | - | - | - | - |