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Metric Grade 10.9 Studs Manufacturer & Exporter in India

Explore Metric Grade 10.9 Studs Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are Metric Grade 10.9 Studs?

Metric Grade 10.9 studs are high-strength carbon steel fasteners manufactured to ISO 898-1 and EN 20898-1 standards, designed for critical bolted joints requiring elevated tensile and yield strength. These studs are quenched and tempered to achieve a minimum tensile strength of 1040 MPa and are widely specified for structural, automotive, and heavy machinery applications where reliability and fatigue resistance are essential.

Grade 10.9 studs are supplied with rolled ISO metric threads and are available in both double-ended and fully threaded configurations. Their superior mechanical properties make them the preferred choice for flange connections, engine assemblies, and pressure vessel closures in demanding environments.

Quick Specifications

MaterialAlloyed Carbon Steel (Quenched & Tempered)
Grade10.9
Material StandardISO 898-1 / EN 20898-1
Stud Standard (Metric)DIN 976 / DIN 939 / ISO 898-1
Stud Standard (Inch)ASME B18.31.2
Thread FormISO Metric (Coarse & Fine)
Diameter RangeM6-M100
Tensile Strength1040 MPa (min)
Yield Strength940 MPa (min)
Hardness32-39 HRC
? All batches tested for mechanical and chemical compliance. 3.1 certification available.

Complete the Fastener Set

Other Metric Grade 10.9 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Metric Grade 10.9 fastener range from certified alloy steel bar stock, including Metric Grade 10.9 Bolts, Metric Grade 10.9 Nuts, Metric Grade 10.9 Screws, Metric Grade 10.9 Washers, and Metric Grade 10.9 Threaded Rods. All Metric Grade 10.9 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Metric Grade 10.9 Bolts
Metric Grade 10.9 Nuts
Metric Grade 10.9 Screws
Metric Grade 10.9 Washers
Metric Grade 10.9 Threaded Rods

Technical Data

Metric Grade 10.9 Studs Dimensions, Sizes & Thread Standards

Metric Grade 10.9 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (fully threaded) / DIN 939 (double-ended) / ISO 898-1. Custom lengths available in 5mm increments. Inch dimensions per ASME B18.31.2 on request. All Metric Grade 10.9 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.0Full / 1820200
M81.25Full / 2225250
M101.5Full / 2630300
M121.75Full / 3035400
M162.0Full / 3840500
M202.5Full / 4650600
M243.0Full / 5460800
M303.5Full / 66701000
M364.0Full / 78801200
M424.5Full / 90901500
M485.0Full / 1021002000
M565.5Full / 1141202000
M646.0Full / 1261402500
M726.0Full / 1381602500
M806.0Full / 1501803000
M1006.0Full / 1742003000

Dimensional & Material Standards

StandardCoversThread
DIN 976Fully threaded studsMetric
DIN 939Double-ended studsMetric
ISO 898-1Mechanical propertiesMetric
ASME B18.31.2Continuous thread studsUNC/UNF
ISO 965Thread tolerancesMetric
Material StandardRequirement
ISO 898-1Grade 10.9 mechanical
EN 20898-1Grade 10.9 mechanical
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Metric Grade 10.9 Chemical Composition

Metric Grade 10.9 Studs are produced from medium-carbon or alloy steel with carbon (0.15–0.55%), chromium, manganese, and boron additions controlled per ASTM and ISO 898-1. Carbon content and quench-and-temper heat treatment are the primary strength levers, delivering proof loads from 580 MPa (Class 8.8) to 970 MPa (Class 12.9).

Chemical Composition per ISO 898-1

ElementComposition (%)
Carbon (C)0.28-0.50
Manganese (Mn)0.50-1.65
Phosphorus (P)0.035 max
Sulfur (S)0.035 max
Silicon (Si)0.15-0.55
Chromium (Cr)0.30 max
Nickel (Ni)0.40 max
Boron (B)0.003 max
? All heats spectro-tested for compliance. Full traceability provided.

Why Metric Grade 10.9 Alloy Composition Matters for Studs

Carbon & Manganese — Strength & Toughness
The controlled carbon and manganese content ensures high tensile and yield strength while maintaining ductility, essential for reliable clamping force in critical joints.
Low Phosphorus & Sulfur — Crack Resistance
Strict limits on phosphorus and sulfur minimize the risk of embrittlement and cracking, especially under dynamic or impact loads.
Boron Microalloying — Hardenability
Trace boron additions improve hardenability during quenching, ensuring uniform mechanical properties throughout the stud’s cross-section.

Fastener Performance

Metric Grade 10.9 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Metric Grade 10.9 Studs per ASTM. Metric Grade 10.9 studs achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12957645
M1623518885
M20460368135
M24800640195
M3016001280315
M3628002240460
M4242003360630
M4862004960820
?? Anti-galling: Use molybdenum-based anti-seize for assembly. Lubricated values assume K=0.14. Avoid over-torquing to prevent thread damage.

Industry Applications

Metric Grade 10.9 Studs Applications — Industries & End Uses

Metric Grade 10.9 Studs from RealBolt are specified across structural engineering, automotive, machinery, and pressure vessels where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Grade 10.9 studs are the standard for bolted connections in steel structures, bridge assemblies, and heavy machinery frames where high clamp load and fatigue resistance are required. Used in wind turbine towers, mining equipment, and crane assemblies.
Widely used in automotive cylinder heads, exhaust manifolds, and drivetrain assemblies. Their high strength ensures reliable performance under thermal cycling and vibration. OEMs specify Grade 10.9 for critical engine and chassis joints.
Stud bolt sets for pressure vessel closures, heat exchanger channel covers, and pipeline flange joints in oil & gas, chemical, and power generation industries. Grade 10.9 provides the necessary strength for Class 150-600 flanges.
Used in railway track fastenings, bridge bearings, and infrastructure anchorages where dynamic loading and long-term reliability are essential. Grade 10.9 studs meet EN 15048 for non-preloaded structural bolting.

Metric Grade 10.9 Studs Standards & International Certifications

Metric Grade 10.9 Studs from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, hardness test certificate, dimensional inspection report per ISO 4759, and proof load test records — available on request for all orders.
Standards
DIN 938 DIN 939 DIN 976-1 ASME B18.31.2 IS 1364 IS 1367
Certifications
ISO 9001:2015EN 10204 3.1PED 2014/68/EUCE MarkingRoHS Compliant

Buy Metric Grade 10.9 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Metric Grade 10.9 Studs — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
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Answers for Buyers

Metric Grade 10.9 Studs — Frequently Asked Questions

Browse expert answers to common questions about Metric Grade 10.9 Studs from RealBolt — covering property class, tensile and proof load, galvanizing embrittlement risk, surface finishes, and dimensional certification. Contact our technical team directly for project-specific guidance on Metric Grade 10.9 studs selection and pricing.
Metric Grade 10.9 studs are manufactured to ISO 898-1 and EN 20898-1 for mechanical properties, with dimensional standards per DIN 976 (fully threaded) and DIN 939 (double-ended). Inch series studs are available to ASME B18.31.2. All products are supplied with EN 10204 3.1 certification and full traceability.
For Grade 10.9 studs, use a molybdenum-based anti-seize compound or graphite-based lubricant to prevent galling and ensure accurate torque application. Avoid copper-based lubricants in corrosive environments. Lubricated torque values should be reduced by 20% compared to dry assembly.
Metric Grade 10.9 studs are suitable for service temperatures up to 300°C. For applications above this, consider Grade 8.8 for moderate temperatures or alloy steel studs for higher temperatures. Consult with our engineering team for specific recommendations.
No MOQ for standard sizes (M12-M36) available ex-stock. Custom sizes or special coatings may require a minimum order of 10 kg. Bulk discounts apply at 50, 200, and 500 pieces. Sample orders are accepted for project trials.

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