Panchsheel Fasteners develops high strength structural bolts

Panchsheel Fasteners has developed high-strength structural bolts as per EN-14399

 Panchsheel Fasteners is mainly in manufacturing High Strength Structural Fasteners (HSFG) conforming to IS, ASTM and now it has developed manufacturing fasteners conforming to EN-14399 standard. It offers its standard product in set of bolt, nut and washer assembly, in both systems i.e. HR and HV.

In HR system, the thread length of the bolt varies with the total length of the bolt, the nut height is more and the product is available in the grades 8.8/8 as well as 10.9/10. While in HV system, the thread length of the bolt is fixed irrespective of the total length of the bolt, nut height is small and product is available only in 10.9/10 grade. However, the company claims that both of these systems are proven and selection of the system is done by the experts or structural engineer.

Panchsheel offers the product from M12 to M36 and the length from 35 mm to 200 mm. As a special case it can also manufacture M42, M45 and M 52 dia. bolts having length 125 mm to 500 mm. in 8.8 or 10.9 grades.

The company has chosen the quality high grade alloy steel to manufacture the bolts and high grade carbon steel to manufacture the nuts and washers. It also uses some special lubricants for nut threads.

Panchsheel offers the product in natural finish or in hot dip galvanised finish or as per the customer’s requirement. The coating process is carried out according to the need of the standard at its works and is under control of the company’s experienced technicians, assures the company.

A tightening test is conducted at the company’s laboratory to verify the suitability of high strength bolt/nut/washer assemblies for preloaded connection in steel structures. A test is carried out to check the behaviour of the fastener assembly so as to ensure that the required preload can be reliably obtained by the tightening methods with sufficient margins against over tightening and against failure.

The company has installed all the necessary inspection and test equipment to check the dimensional parameters, thread profiles, mechanical properties and metallurgical parameters. Recently the company has purchased an induced load measuring machine. In addition, it is also planning to buy equipment measuring the torque and angle of nut rotation which is core requirement for the fasteners conforming to EN-14399.

The specialty of these fasteners is they are tested for induced load developed within the bolt at specified torque and the rotation of the nut. In other words this measures the loss of torque during the tightening. This loss is due to friction between nut face and washer face, and friction between bolt threads and nut threads. This ensures the proper installation of the bolt. The product finds its applications mainly for the wind mill structures, heavy civil structures and bridges.

Panchsheel manufactures and supplies bolts, screws, studs, nuts, lock nuts, washers, direct tension indicating washers, foundation bolts and components as per the customers drawing and specifications. It also manufactures the fasteners as per IS, ISO, BS, DIN, EN, ASTM and SAE standards, or as per customer’s specifications. The company believes its core strength is manufacturing and testing fasteners. Its plant is capable to produce 500 MT/month of fasteners with latest manufacturing technologies and testing facilities.