| Screw Thread d |
p |
b |
f |
Dk |
k1 |
k |
s |
| Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
| M10 |
1.5 |
22 |
13.3 |
14 |
18.35 |
19.65 |
4.625 |
5.375 |
5.4 |
6.6 |
9.42 |
10.58 |
| M12 |
1.75 |
24.5 |
17.3 |
18 |
23.35 |
24.65 |
6.55 |
7.45 |
7.25 |
8.75 |
11.3 |
12.7 |
| M16 |
2 |
31 |
21.16 |
22 |
29.35 |
30.65 |
7.55 |
8.45 |
9.25 |
10.75 |
15.3 |
16.7 |
| M20 |
2.5 |
34 |
29.16 |
30 |
37.2 |
38.8 |
9.55 |
10.45 |
11.6 |
13.4 |
19.16 |
20.84 |
| M22 |
2.5 |
39 |
32 |
33 |
41.2 |
42.8 |
11.45 |
12.55 |
13.1 |
14.9 |
21.16 |
22.84 |
| Proof Load |
Size Range |
Equivalent Standards |
| Property Class |
Diameter |
Length |
| PSI |
N/mm2 |
Grade |
Metric |
Inch |
Metric |
Inch |
IS |
ISO |
DIN |
BS |
ANSI |
JIS |
| 74000 to 174000 |
510 to 1200 |
4 to 12 |
M10 to M22 |
0.4“ to 0.9 " |
- |
- |
- | - | - | - | - | - |
Fish Bolt: Key Features and Applications
Fish bolts, also known as fishplate bolts, are specialized fasteners
used primarily in railway track assemblies and heavy-duty structural applications. Named for their association
with fishplates—metal plates used to join sections of rail—these bolts are designed to provide a secure
and stable connection between rail segments, ensuring smooth and reliable track operation. At Pankaj
International, a leading fastener manufacturer in Ludhiana, we produce high-quality fish bolts that
adhere to stringent industry standards, delivering strength and durability for demanding applications.
Precision Engineering for Rail and Structural Stability
Fish bolts are engineered to provide a precise and secure fit in railway
track systems and heavy structures. Their unique design includes a long shank and a wide, flat head, which
allows for a strong clamping force across large surfaces. This design is crucial for ensuring the stability of
railway tracks, where the bolts must withstand significant loads and vibrations from passing trains. The robust
construction of fish bolts from Pankaj International ensures that they maintain the integrity of track joints
and structural connections, preventing any movement or misalignment that could compromise safety and
performance.
Durability and Corrosion Resistance
Given their exposure to the elements, fish bolts must be highly resistant to
corrosion and wear. Our fish bolts are manufactured from high-quality materials such as alloy steel and are
treated with protective coatings like hot-dip galvanization or zinc plating. These coatings provide excellent
resistance to rust and corrosion, ensuring the bolts remain functional and reliable over time, even in
harsh weather conditions. The durability of our fish bolts reduces the need for frequent maintenance or
replacements, making them a cost-effective choice for long-term use in railway and structural applications.
Conclusion
Fish bolts are essential for the reliable and stable operation of railway
tracks and heavy-duty structural systems. Their precise engineering and high durability make them ideal for
applications where secure and long-lasting connections are critical. At Pankaj International, we are dedicated
to producing high-quality fish bolts that meet the highest standards of performance and reliability. Whether you
are involved in railway track maintenance or heavy structural projects, our fish bolts provide the
strength and durability needed to ensure safety and efficiency. Contact us today to learn more about our
fastener solutions and how we can support your specific requirements.