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HSFG Bolt Assembly

The HSFG Bolt Assembly (High-Strength Friction Grip) is designed for applications requiring high load-bearing capacity and precision in structural connections. These assemblies include a bolt, nut, and washer, ensuring reliable friction-based fastening without relying on thread shear. Widely used in bridges, steel frameworks, and industrial plants, they comply with global standards like DIN and ISO. At Pankaj International, we deliver customized HSFG Bolt Assemblies engineered for heavy-duty construction projects worldwide.

Size Range
Diameter Metric: M12 - M36
Length length upto 10
Technical Specifications


Dia. p s e c r k
Max. Min. Min. Max. Min. Min. Max. Min.
M12 1.75 22.00 21.16 23.91 0.6 0.4 1.2 8.45 7.55
M16 2.00 27.00 26.16 29.56 0.6 0.4 1.2 10.75 9.25
M20 2.50 32.00 31.00 35.03 0.8 0.4 1.5 13.90 12.10
M22 2.50 36.00 35.00 39.55 0.8 0.4 1.5 14.90 13.10
M24 3.00 41.00 40.00 45.20 0.8 0.4 1.5 15.90 14.10
M27 3.00 46.00 45.00 50.85 0.8 0.4 2.0 17.90 16.10
M30 3.50 50.00 49.00 55.37 0.8 0.4 2.0 20.05 17.95
M36 4.00 60.00 58.80 66.44 0.8 0.4 2.0 24.05 21.95

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 M12 to M36 0.5“ to 1.4 " - - - - - - - -



1. Superior Strength and Friction-Based Reliability


HSFG Bolt Assemblies are engineered for high-tensile strength, providing unparalleled reliability in critical structural applications. Unlike conventional bolts, HSFG bolts transfer loads through friction, eliminating the need for thread engagement. This ensures a stronger connection with reduced deformation under dynamic loads, making these assemblies a cornerstone in steel bridges, railway structures, and industrial frameworks.


2. Compliance with Global Standards


At Pankaj International, our HSFG Bolt Assemblies are manufactured to meet international standards, including DIN , ISO, and BS . These bolts undergo rigorous testing to ensure consistency in performance under high-stress environments. We offer assemblies tailored to customer specifications, ensuring compatibility with projects adhering to GOST and other national standards.


3. Advanced Material Options for Durability


Our HSFG bolts are crafted from high-grade alloy steel, offering superior tensile properties and exceptional resistance to environmental factors. Options like zinc-coated, galvanized, and stainless steel finishes ensure durability against corrosion, making them suitable for marine, aerospace, and renewable energy applications. This versatility guarantees a long service life even in the most challenging environments.


4. Precision Engineering for Heavy-Duty Applications


HSFG Bolt Assemblies are preferred in heavy machinery, industrial plants, and large-scale construction projects. Their friction-based fastening ensures minimal slippage, making them ideal for securing girders, trusses, and beams. With a focus on precision engineering, these assemblies reduce installation errors, enhance structural integrity, and contribute to project efficiency.


5. Comprehensive Range of Applications


HSFG bolts find extensive use in infrastructure projects, mining equipment, and clean energy projects. Their ability to withstand vibration, shear, and tensile stresses ensures reliability in critical applications like power plants, wind turbines, and seismic-resistant structures. At Pankaj International, we pride ourselves on delivering high-performance fasteners for diverse industries.

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Pankaj International is an ISO Certified Nationwide Manufacturer of Stocked and Custom Nuts, Bolts and Fasteners

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