| Nominal Diameter |
Dia. (b) |
Across Flats |
Across Corners |
h |
r |
Thread length (l) |
| (Max.) |
(Max.) |
(Min.) |
(Max.) |
(Min.) |
(Max.) |
(Min.) |
(Max.) |
(Min.) |
6 inch. or Shorter |
over 6 inch. |
| 1/4 " |
.2500 |
.375 |
.362 |
.530 |
.498 |
.188 |
.156 |
0.03 |
0.01 |
.750 |
1.000 |
| 5/16 " |
.3125 |
.500 |
.484 |
.707 |
.665 |
.220 |
.186 |
0.03 |
0.01 |
.875 |
1.125 |
| 3/8 " |
.3750 |
.562 |
.544 |
.795 |
.747 |
.268 |
.232 |
0.03 |
0.01 |
1.000 |
1.250 |
| 7/16 " |
.4375 |
.625 |
.603 |
.884 |
.828 |
.316 |
.278 |
0.03 |
0.01 |
1.125 |
1.375 |
| 1/2 " |
.5000 |
.750 |
.725 |
1.061 |
.995 |
.348 |
.308 |
0.03 |
0.01 |
1.250 |
1.500 |
| 5/8 " |
.6250 |
.938 |
.906 |
1.326 |
1.244 |
.444 |
.400 |
0.06 |
0.02 |
1.500 |
1.750 |
| 3/4 " |
.7500 |
1.125 |
1.088 |
1.591 |
1.494 |
.524 |
.476 |
0.06 |
0.02 |
1.750 |
2.000 |
| 7/8 " |
.8750 |
1.312 |
1.269 |
1.856 |
1.742 |
.620 |
.568 |
0.06 |
0.02 |
2.000 |
2.250 |
| 1 " |
1.0000 |
1.500 |
1.450 |
2.121 |
1.991 |
.684 |
.628 |
0.09 |
0.03 |
2.250 |
2.500 |
| 1-1/8 " |
1.1250 |
1.688 |
1.631 |
2.386 |
2.239 |
.780 |
.720 |
0.09 |
0.03 |
2.500 |
2.750 |
| 1-1/4 " |
1.2500 |
1.875 |
1.812 |
2.652 |
2.489 |
.876 |
.812 |
0.09 |
0.03 |
2.750 |
3.000 |
| 1-3/8 " |
1.3750 |
2.062 |
1.994 |
2.917 |
2.738 |
.940 |
.872 |
0.09 |
0.03 |
3.000 |
3.250 |
| 1-1/2 " |
1.5000 |
2.250 |
2.175 |
3.182 |
2.986 |
1.036 |
.964 |
0.09 |
0.03 |
3.250 |
3.500 |
Square Head Bolt: Essential Features and Uses
Square head bolts are versatile fasteners with a distinctive square-shaped
head that provides a robust and secure connection in various applications. Known for their ability to be easily
tightened with standard tools such as wrenches, these bolts are often used in scenarios where a higher level of
torque is required or where space constraints make it difficult to use other types of fasteners. At Pankaj
International, a premier fastener manufacturer in Ludhiana, we offer high-quality square head bolts that
adhere to rigorous standards, ensuring reliability and durability across a range of applications.
Enhanced Grip and Torque Transmission
The square head design of these bolts offers a significant advantage in terms of
grip and torque transmission. Unlike hex head bolts, the square head provides four flat surfaces for the
wrench to engage with, which can be beneficial for applying higher torque or for working in tighter spaces. This
design ensures a secure fit and effective tightening, making square head bolts particularly useful in heavy-duty
applications such as construction, machinery assembly, and structural work. At Pankaj International, our square
head bolts are crafted to deliver superior performance and stability, providing the necessary strength to handle
demanding tasks.
Durability and Versatility
Square head bolts are built to withstand tough conditions, and at Pankaj
International, we manufacture these bolts using high-grade materials such as alloy steel and stainless steel.
These materials offer excellent tensile strength and resistance to wear, ensuring that the bolts maintain their
integrity even under high loads and harsh environments. Additionally, our square head bolts are available in
various finishes, including zinc plating and hot-dip galvanization, which enhance their corrosion resistance and
make them suitable for outdoor and marine applications. This versatility allows our bolts to be used in a wide
range of industries, from automotive and machinery to construction and infrastructure.
Conclusion
Square head bolts are an essential component in applications requiring robust and
reliable fastening solutions. Their unique design and high strength make them ideal for heavy-duty tasks and
environments where secure connections are critical. At Pankaj International, we are dedicated to producing
high-quality square head bolts that meet the highest standards of performance and durability. Whether you
are working on construction projects, machinery assembly, or other demanding applications, our square head bolts
provide the reliability and strength you need. Contact us today to discover more about our fastener solutions
and how we can support your specific needs