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IS 3757 High Strength Structural Bolts – Manufacturer, Exporter & Supplier

We manufacture and export IS 3757 High Strength Structural Bolts conforming to exact IS 3757 dimensional and mechanical specifications. Available in 8.8 (HT) / 10.9 (HT), our IS 3757 structural hex bolts pass rigorous in-house testing — hardness, tensile and dimensional — before dispatch. ISO 9001:2015 certified production, EN 10204 3.1 mill test reports supplied as standard, and dedicated export documentation for 50+ destination countries.
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IS 3757 Key Specifications

The core specification data for IS 3757 High Strength Structural Bolts, at a glance.

Standard

IS 3757

Type

High Strength Structural Bolts

Size Range

M16 to M36

Thread Pitch

Coarse Thread

Property Class / Grade

8.8 (HT) / 10.9 (HT)

Head / Drive Type

Hex Head / High Tensile

About IS 3757 High Strength Structural Bolts

IS 3757 High Strength Structural Bolts are structural hex bolts produced and tested to the exact requirements of the IS 3757 specification. Featuring a Hex Head / High Tensile configuration with Coarse Thread thread form, they are available in property classes 8.8 (HT) / 10.9 (HT) across a size range of M16 to M36. The IS 3757 standard governs dimensional tolerances, mechanical properties including tensile strength, proof load and hardness, as well as surface finish requirements to ensure dependable performance in Structural Steel and Bridges applications worldwide.
Our IS 3757 High Strength Structural Bolts are cold-forged from certified bar stock, heat-treated where required, and thread-rolled to guarantee consistent fit and fatigue performance. Every batch is documented with an EN 10204 3.1 Mill Test Report covering chemical composition, mechanical test results and dimensional inspection. Available in zinc electroplated, hot-dip galvanised, Geomet, Dacromet and black oxide finishes to match corrosion-resistance requirements for Industrial Buildings, Towers and Heavy Fabrication applications. As a global exporter of IS 3757 fasteners, we consolidate orders with other standard-specification items into single shipments, backed by complete customs documentation for over 50 countries.
Technical Specifications

Raw Material

8.8 (HT) Alloy / Stainless Steel

Country of Origin

India

Standard Body

IS

Corrosion Resistance

Salt-spray tested to relevant grade

Recommended Torque

Per property class / grade

Storage Conditions

Dry, corrosion-inhibited packing

IS 3757 Dimensions & Size Chart

Precise dimensional data for every IS 3757 High Strength Structural Bolts size, cross-referenced against the standard’s key measurement points.
Size (M)s (mm)k (mm)Tensile Strength (MPa)Proof Load (MPa)L Range (mm)
M162710.080060045–150
M203412.580060055–150
M223614.080060060–150
M244115.580060065–150
M274617.580060075–150
M305018.780060080–150
M366022.5800600100–150
Key Dimension Callouts

d

Nominal thread diameter measured across the major thread.

l

Bolt length measured from under head to end.

k

Head height from bearing surface to top face.

s

Across-flats hexagon size for wrench engagement.

Related IS Fastener Standards for Bolts, Nuts and Washers

Additional IS fastener standards help engineers and buyers compare bolts, screws, nuts, washers, stud bolts and threaded rods by dimensions, tolerances, thread specifications, mechanical properties and material grades. Review the wider IS standards family to match manufacturing standards, quality requirements and engineering specifications with the correct fastener solution for industrial applications.
IS 1363
IS 1364
IS 1367
IS 5372
IS 6623
IS 12427

IS 3757 High Strength Structural Bolts – Material Grades & Property Classes

IS 3757 High Strength Structural Bolts are available across multiple property classes and surface finish options to match load-bearing and corrosion-resistance requirements for Structural Steel, Bridges and Industrial Buildings applications.
Property Classes
8.8 (HT) 10.9 (HT)
Surface Treatments
Zinc Electroplated Hot-Dip Galvanised (HDG) Geomet Coating Dacromet Coating Black Oxide Phosphate & Oil Plain (Self Colour) Nickel Plated

Why Choose Us for IS 3757 High Strength Structural Bolts?

Nine reasons buyers worldwide rely on us as their IS 3757 High Strength Structural Bolts manufacturer and export partner.
ISO Certified Production

Every batch of IS 3757 High Strength Structural Bolts is manufactured under an ISO 9001:2015 certified quality management system with full in-process control.

EN 10204 3.1 MTR Supplied

A mill test report covering chemical composition, tensile, hardness and dimensional inspection accompanies every IS 3757 High Strength Structural Bolts shipment.

48-hr Dispatch on Stock Items

Commonly stocked IS 3757 High Strength Structural Bolts sizes leave our warehouse within 48 hours of order confirmation, minimising your downtime.

Export to 50+ Countries

Established freight and customs partners ensure reliable delivery of IS 3757 High Strength Structural Bolts to buyers in over 50 countries worldwide.

Custom Sizes & Lengths

Non-standard IS 3757 High Strength Structural Bolts lengths, diameters and special thread pitches are produced to order to match your drawing requirements.

Competitive Factory Pricing

Direct-from-factory pricing on IS 3757 High Strength Structural Bolts with no middleman markup, offering the best value on volume and repeat orders.

In-House Metallurgical Testing

Hardness, tensile strength and dimensional checks for IS 3757 High Strength Structural Bolts are performed in our in-house laboratory before every release.

Consolidated Multi-Standard Shipping

Combine IS 3757 High Strength Structural Bolts with other standard-specification fasteners into a single container shipment to reduce freight costs.

Dedicated Export Documentation Team

Our specialist team prepares all customs, compliance and shipping paperwork for every IS 3757 High Strength Structural Bolts export order.

IS 3757 High Strength Structural Bolts – Applications & End Uses

IS 3757 High Strength Structural Bolts are widely specified across multiple industries. Select an industry below to see how our IS 3757 structural hex bolts are applied.
IS 3757 High Strength Structural Bolts are used in structural steel for critical fastening applications where dimensional accuracy and mechanical performance are essential. Grade 8.8 (HT) is most commonly specified for structural steel environments.
In bridges, IS 3757 High Strength Structural Bolts are valued for consistent dimensions and reliable load-bearing capability. We supply with full test documentation to support quality audits and project inspections.
IS 3757 High Strength Structural Bolts are used in industrial buildings assemblies where precise torque control and consistent fit are critical. We supply to OEM manufacturers and contractors with custom packaging formats.
For towers applications, IS 3757 High Strength Structural Bolts are supplied with material test reports, dimensional inspection certificates and PPAP documentation where required.
IS 3757 High Strength Structural Bolts for heavy fabrication use are selected from stainless steel or coated grades to provide appropriate corrosion resistance while maintaining specified mechanical performance.
In general engineering applications, IS 3757 High Strength Structural Bolts are fastened into assemblies requiring long-term reliability. Our export-packaged IS 3757 structural hex bolts arrive protected from transit corrosion with full documentation.

Request a Quote for IS 3757 High Strength Structural Bolts

Get pricing and lead times for your required sizes and quantities. ISO 9001 certified. EN 10204 3.1 MTR supplied. Export to 50+ countries.
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Frequently Asked Questions About IS 3757

Common questions from buyers sourcing IS 3757 High Strength Structural Bolts, covering sizes, grades, documentation and lead times.
We supply IS 3757 High Strength Structural Bolts from M16 to M36 in Coarse Thread thread. Standard lengths are stocked; non-standard lengths are produced to order. Contact us with your exact requirements for availability confirmation.
IS 3757 High Strength Structural Bolts are supplied in 8.8 (HT) / 10.9 (HT). Carbon and alloy steel grades comply with ISO 898-1 and stainless steel grades comply with ISO 3506. ASTM grades are available for USA and Canadian export orders.
Every IS 3757 High Strength Structural Bolts order includes an EN 10204 3.1 Mill Test Report covering chemical composition, tensile strength, hardness and proof load. Third-party inspection by SGS, BV or TUV can be arranged on request.
Stocked IS 3757 High Strength Structural Bolts sizes dispatch within 48 hours of order confirmation. Custom lengths, special grades or surface finishes typically ship within 2-3 weeks. Contact us for a specific lead time on your required size and quantity.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
  • Canada
  • Mexico
  • Germany
  • UK
  • France
  • Italy
  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
  • New Zealand
  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
  • Vietnam
  • South Korea
  • Japan
  • Brazil