Secure Fastening Round Head Bolts are commonly used in solar panel installation scenarios, and are particularly widely used in rooftop installation operations. These bolts have a ceramic coating, which helps them withstand adverse weather conditions, and their circular shape also reduces wind resistance.
For larger orders, we ship by sea (it takes 15 to 20 days to Europe), while smaller orders are shipped by air (4 to 6 days). If you order more than 5 containers, you will enjoy a 18% discount on the shipping cost.
These bolts are packed in sturdy boxes, which are filled with foam materials to protect them from high or low temperatures during transportation. We will test them to ensure they are strong enough to support the panels and will also subject them to salt spray tests to check their corrosion resistance. Before shipment, certified engineers will inspect each batch of products. These bolts are dual TUV and UL certified for use in solar applications.
The assembly and fixation of medical equipment (such as hospital beds and operating tables) often rely on securely tightening Secure Fastening Round Head Bolts to ensure stability in use. They are made of 316L stainless steel, a material suitable for medical use and easy to clean thoroughly.
We will ship them domestically within 2 to 3 days using a truck equipped with a constant temperature device. International orders will be sent by air and will arrive in 4 to 6 days. Orders over $10,000 will enjoy free delivery service. Each bolt is placed in a sterile and heat-resistant bag to maintain its cleanliness until use.
We will test the bolts to ensure they are biocompatible and have no flaws on the surface. Each batch of products will be disinfected and inspected before shipment. They have also obtained ISO 13485 certification, meaning they meet medical standards and we will attach a traceability report to each order.
Mon | M5 | M6 | M8 | M10 | M12 | M16 | M20 |
P | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 |
dk max | 13.55 | 16.55 | 20.65 | 24.65 | 30.65 | 38.8 | 46.8 |
dk min | 12.45 | 15.45 | 19.35 | 23.35 | 29.35 | 37.2 | 45.2 |
ds max | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
ds min | 4.52 | 5.52 | 7.42 | 9.42 | 11.3 | 15.3 | 19.16 |
k1 max | 4.1 | 4.6 | 5.6 | 6.6 | 8.75 | 12.9 | 15.9 |
k1 min | 2.9 | 3.4 | 4.4 | 5.4 | 7.25 | 11.1 | 14.1 |
k max | 3.3 | 3.88 | 4.88 | 5.38 | 6.95 | 8.95 | 11.05 |
k min | 2.7 | 3.12 | 4.12 | 4.62 | 6.05 | 8.05 | 9.95 |
r max | 0.5 | 0.5 | 0.5 | 0.5 | 1 | 1 | 1 |
s max | 5.48 | 6.48 | 8.58 | 10.58 | 12.7 | 16.7 | 20.84 |
s min | 4.52 | 5.52 | 7.42 | 9.42 | 11.3 | 15.3 | 19.16 |
Q: Can Round Head Bolts be used in applications requiring frequent disassembly?
A: Yes, Secure Fastening Round Head Bolts are perfect for components that need to be disassembled frequently. Its shape is designed to fit ordinary wrenches or sockets, helping you quickly complete disassembly and reassembly operations. We also have versions with lubricated threads or special coatings to reduce wear during repeated use.
However, if they are to be used in high-vibration environments, we recommend using lock washers or nuts with nylon sleeves. If you do this, even if you disassemble and reassemble it many times, all the parts will still be strong and reliable.