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IS 6623 High Strength Structural Nuts – Manufacturer, Exporter & Supplier

We manufacture and export IS 6623 High Strength Structural Nuts conforming to exact IS 6623 dimensional and mechanical specifications. Available in 10 (HT), our IS 6623 structural hex nuts 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 6623 Key Specifications

The core specification data for IS 6623 High Strength Structural Nuts, at a glance.

Standard

IS 6623

Type

High Strength Structural Nuts

Size Range

M16 to M36

Thread Pitch

Coarse Thread

Property Class / Grade

10 (HT)

Head / Drive Type

Hex

About IS 6623 High Strength Structural Nuts

IS 6623 High Strength Structural Nuts are structural hex nuts produced and tested to the exact requirements of the IS 6623 specification. Featuring a Hex configuration with Coarse Thread thread form, they are available in property classes 10 (HT) across a size range of M16 to M36. The IS 6623 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 6623 High Strength Structural Nuts 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, Heavy Engineering and General Engineering applications. As a global exporter of IS 6623 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

10 (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 6623 Dimensions & Size Chart

Precise dimensional data for every IS 6623 High Strength Structural Nuts size, cross-referenced against the standard’s key measurement points.
Size (M)s (mm)m (mm)Proof Load (kN)
M162716.0125
M203420.0198
M223622.0245
M244124.0286
M274627.0367
M305030.0458
M366036.0660
Key Dimension Callouts

d

Nominal internal thread diameter of the nut.

m

Nut height measured parallel to the thread axis.

s

Across-flats wrench size of the hexagon nut.

e

Minimum across-corners diameter of the hexagon nut.

Browse Related IS Fastener Standards and Engineering Specifications

Additional IS fastener standards help engineers, manufacturers, and procurement teams compare bolts, screws, nuts, washers, stud bolts, and threaded rods by dimensions, tolerances, thread specifications, mechanical properties, and material grades. Explore the wider IS standards family to verify manufacturing standards, quality requirements, and engineering specifications for reliable industrial applications.
IS 1363
IS 1364
IS 1367
IS 3757
IS 5372
IS 12427

IS 6623 High Strength Structural Nuts – Material Grades & Property Classes

IS 6623 High Strength Structural Nuts 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
10 (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 6623 High Strength Structural Nuts?

Nine reasons buyers worldwide rely on us as their IS 6623 High Strength Structural Nuts manufacturer and export partner.
ISO Certified Production

Every batch of IS 6623 High Strength Structural Nuts 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 6623 High Strength Structural Nuts shipment.

48-hr Dispatch on Stock Items

Commonly stocked IS 6623 High Strength Structural Nuts 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 6623 High Strength Structural Nuts to buyers in over 50 countries worldwide.

Custom Sizes & Lengths

Non-standard IS 6623 High Strength Structural Nuts lengths, diameters and special thread pitches are produced to order to match your drawing requirements.

Competitive Factory Pricing

Direct-from-factory pricing on IS 6623 High Strength Structural Nuts 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 6623 High Strength Structural Nuts are performed in our in-house laboratory before every release.

Consolidated Multi-Standard Shipping

Combine IS 6623 High Strength Structural Nuts 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 6623 High Strength Structural Nuts export order.

IS 6623 High Strength Structural Nuts – Applications & End Uses

IS 6623 High Strength Structural Nuts are widely specified across multiple industries. Select an industry below to see how our IS 6623 structural hex nuts are applied.
IS 6623 High Strength Structural Nuts are used in structural steel for critical fastening applications where dimensional accuracy and mechanical performance are essential. Grade 10 (HT) is most commonly specified for structural steel environments.
In bridges, IS 6623 High Strength Structural Nuts are valued for consistent dimensions and reliable load-bearing capability. We supply with full test documentation to support quality audits and project inspections.
IS 6623 High Strength Structural Nuts 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 heavy engineering applications, IS 6623 High Strength Structural Nuts are supplied with material test reports, dimensional inspection certificates and PPAP documentation where required.
IS 6623 High Strength Structural Nuts for general engineering use are selected from stainless steel or coated grades to provide appropriate corrosion resistance while maintaining specified mechanical performance.
In general engineering applications, IS 6623 High Strength Structural Nuts are fastened into assemblies requiring long-term reliability. Our export-packaged IS 6623 structural hex nuts arrive protected from transit corrosion with full documentation.

Request a Quote for IS 6623 High Strength Structural Nuts

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 6623

Common questions from buyers sourcing IS 6623 High Strength Structural Nuts, covering sizes, grades, documentation and lead times.
We supply IS 6623 High Strength Structural Nuts 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 6623 High Strength Structural Nuts are supplied in 10 (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 6623 High Strength Structural Nuts 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 6623 High Strength Structural Nuts 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