| Thread Size d |
p |
Dk |
k |
r |
t |
t1 |
e |
s |
| Min. | Max. |
Nom. |
Min. |
Min. |
Max. |
Max. |
Min. |
Nom. |
Min. |
Max. |
| M3 |
0.5 |
5.7 |
6 |
1.7 |
0.1 |
0.95 |
1.2 |
1.85 |
2.3 |
2 |
2.02 |
2.1 |
| M4 |
0.7 |
7.64 |
8 |
2.3 |
0.2 |
1.55 |
1.8 |
2.69 |
2.87 |
2.5 |
2.52 |
2.60 |
| M5 |
0.8 |
9.64 |
10 |
2.8 |
0.2 |
2.05 |
2.3 |
3.18 |
3.44 |
3 |
3.02 |
3.10 |
| M6 |
1.0 |
11.57 |
12 |
3.3 |
0.30 |
2.25 |
2.5 |
3.58 |
4.58 |
4 |
4.02 |
4.12 |
| M8 |
1.25 |
15.57 |
16 |
4.4 |
0.5 |
3.2 |
3.5 |
4.42 |
5.72 |
5 |
5.02 |
5.14 |
| M10 |
1.5 |
19.48 |
20 |
5.5 |
0.5 |
4.1 |
4.4 |
6.01 |
6.86 |
6 |
6.02 |
6.14 |
| M12 |
1.75 |
23.48 |
24 |
6.5 |
1.0 |
4.3 |
4.6 |
6.85 |
9.15 |
8 |
8.025 |
8.175 |
| M16 |
2.0 |
29.48 |
30 |
7.5 |
1.0 |
5.0 |
5.3 |
8.10 |
11.43 |
10 |
10.025 |
10.175 |
| M20 |
3.0 |
35.38 |
36 |
8.5 |
1.0 |
5.6 |
5.9 |
8.70 |
13.73 |
12.0 |
12.032 |
12.212 |
| Tensile Strength |
Size Range |
Equivalent Standards |
| Property Class |
Diameter |
Length |
| PSI |
N/mm2 |
Grade |
Metric |
Inch |
Metric |
Inch |
IS |
ISO |
DIN |
BS |
ANSI |
JIS |
| 60000 to 174000 |
400 to 1200 |
4.6 to 12.9 |
M3 to M20 |
0.1 " to 0.8 " |
20 mm to 300 mm |
0.8 " to 7.9 " |
6761 |
10642 |
7991 |
- |
B18.3.5.M |
B1194 |
Introduction to CSK Socket Bolts
CSK socket bolts, or countersunk socket bolts, are highly versatile
fasteners designed for applications where a flush finish is required. They feature a unique countersunk head
that allows them to sit level with or below the surface of the material they are fastening. This design makes
CSK socket bolts ideal for use in applications where a smooth, unobtrusive finish is necessary, such as
in machinery, automotive components, and precision engineering projects. At Pankaj International, we specialize
in manufacturing high-quality CSK socket bolts that meet rigorous industry standards, ensuring both
functionality and aesthetic appeal.
Design and Functionality
Unique Countersunk Head Design
The defining feature of CSK socket bolts is their countersunk head, which is
designed to fit into a pre-drilled, tapered hole. This allows the bolt to be flush with the surface, providing a
clean and professional appearance. The head is also equipped with a hexagonal recess, which enables the use of a
socket wrench for secure tightening. This design is particularly useful in applications where a protruding bolt
head might interfere with other components or where a streamlined look is desired.
High Strength and Versatility
CSK socket bolts are known for their robust construction and versatility.
They are typically made from high-quality materials such as alloy steel or stainless steel, which provide
excellent tensile strength and durability. This makes them suitable for a wide range of applications, from
heavy-duty machinery and automotive assemblies to delicate electronic devices. The ability to achieve a flush
finish without sacrificing strength makes these bolts a preferred choice in many precision and structural
applications.
Durability and Material Options
Corrosion Resistance and Longevity
Durability is a key attribute of CSK socket bolts, especially in
environments where exposure to moisture and corrosive elements is a concern. At Pankaj International, our CSK
socket bolts are manufactured using high-grade materials and are available with various protective coatings,
including zinc plating and anodization. These treatments enhance the bolts' resistance to corrosion and extend
their service life, making them suitable for both indoor and outdoor applications.
Customization and Quality Assurance
Our commitment to quality means that each CSK socket bolt is produced with
precision and care. We offer a range of sizes and finishes to meet specific application needs, and our products
undergo stringent quality control processes to ensure they meet the highest standards. Whether you require
standard sizes or custom specifications, Pankaj International is dedicated to providing fasteners that deliver
both performance and reliability.
Conclusion
CSK socket bolts are a crucial component for applications requiring a flush,
clean finish combined with robust performance. Their unique design and high strength make them ideal for various
industries, including machinery, automotive, and precision engineering. At Pankaj International, we are
committed to producing high-quality CSK socket bolts that meet the highest standards of durability and
functionality. Contact us today to explore our range of fasteners and find the perfect solution for your
specific need