Metric Grade 10.9 Nuts Manufacturer & Exporter in India

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

-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 Nuts?

Metric Grade 10.9 nuts are high-strength carbon steel fasteners manufactured to ISO 898-2 and EN 20898-2 standards. These nuts are typically paired with Grade 10.9 bolts and are designed for use in critical structural, automotive, and machinery applications where high tensile strength and reliable clamping force are essential.

With a minimum proof load of 940 MPa and a hardness range of 30-36 HRC, Metric Grade 10.9 nuts are heat-treated for superior mechanical performance. They are widely specified for bolted joints subjected to dynamic loads, vibration, and high-stress environments, ensuring secure and durable assemblies in demanding industrial sectors.

Quick Specifications

Material	Alloy Steel (Quenched & Tempered)
Grade	10.9
Standard	ISO 898-2 / EN 20898-2
Nut Types	Hex, Heavy Hex, Flange, Lock, Nylock
Thread Form	ISO Metric (Coarse & Fine)
Diameter Range	M6-M64
Proof Load	940 MPa min
Hardness	30-36 HRC
Finish	Plain, Zinc Plated, Hot Dip Galvanized, Geomet

? All nuts supplied with EN 10204 3.1 certification. Third-party inspection available on request.

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 Screws, Metric Grade 10.9 Washers, Metric Grade 10.9 Studs, 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 Screws

Metric Grade 10.9 Washers

Metric Grade 10.9 Studs

Metric Grade 10.9 Threaded Rods

Technical Data

Metric Grade 10.9 Nuts Dimensions, Sizes & Thread Standards

Metric Grade 10.9 Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per ISO 4032 (hex nut), ISO 4033 (heavy hex), ISO 7042 (prevailing torque), and ISO 4161 (flange nut). Custom thread pitches and finishes available on request. All Metric Grade 10.9 nuts dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Hex Nut Dimensions - Metric (ISO 4032)

Size (M)	Pitch (mm)	A/F (mm)	Height (mm)
M6	1.0	10	5
M8	1.25	13	6.5
M10	1.5	17	8
M12	1.75	19	10
M16	2.0	24	13
M20	2.5	30	16
M24	3.0	36	19
M30	3.5	46	24
M36	4.0	55	29
M42	4.5	65	34
M48	5.0	75	38
M56	5.5	85	45
M64	6.0	95	51

Dimensional & Material Standards

Standard	Covers	Thread
ISO 4032	Hex nuts, regular	Metric
ISO 4033	Hex nuts, heavy	Metric
ISO 7042	Prevailing torque nuts	Metric
ISO 4161	Flange nuts	Metric
DIN 934	Hex nuts	Metric
DIN 6915	Heavy hex nuts	Metric
ASME B18.2.2	Hex nuts (inch)	UNC/UNF

Material Standard	Requirement
ISO 898-2	Mechanical properties
EN 20898-2	Mechanical properties
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

Metric Grade 10.9 Nut Chemical Composition

Metric Grade 10.9 Nuts 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 898-2

Element	Composition (%)
Carbon (C)	0.25% max
Manganese (Mn)	0.6-1.65%
Phosphorus (P)	0.035% max
Sulfur (S)	0.035% max
Silicon (Si)	0.55% max
Boron (B)	0.003% max
Iron (Fe)	Balance

? All heats verified by spectrometry. Full traceability and batch certification provided.

Why Metric Grade 10.9 Alloy Composition Matters for Nuts

Carbon & Manganese — Strength & Toughness

The controlled carbon and manganese content ensures high tensile strength and ductility, allowing Grade 10.9 nuts to withstand high clamp loads and resist brittle fracture under dynamic loading.

Low Phosphorus & Sulfur — Crack Resistance

Strict limits on phosphorus and sulfur minimize the risk of embrittlement and stress corrosion cracking, which is critical for nuts used in safety-critical bolted joints.

Boron Addition — Hardenability

A trace addition of boron improves hardenability during heat treatment, ensuring uniform mechanical properties throughout the nut body for consistent performance.

Fastener Performance

Metric Grade 10.9 Nuts Mechanical Properties & Torque Reference

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

Nut Size	Proof Load (kN)	Recommended Torque (Nm)
M12	84	100
M16	154	250
M20	241	490
M24	349	850
M30	603	1700
M36	870	2950
M42	1230	4400
M48	1670	6100

?? Assembly: Always use matching Grade 10.9 bolts. Lubricate threads for consistent preload. Torque values are for lightly oiled threads.

Industry Applications

Metric Grade 10.9 Nuts Applications — Industries & End Uses

Metric Grade 10.9 Nuts 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.

Structural Steel & Construction

Metric Grade 10.9 nuts are widely used in steel structures, bridges, and building frameworks, paired with Grade 10.9 bolts for high-strength bolted connections that demand reliable proof load and vibration resistance.

Automotive & Heavy Vehicles

These nuts are standard in automotive chassis, suspension, and engine assemblies, providing secure fastening under dynamic loads and thermal cycling in trucks, buses, and off-road vehicles.

Machinery & Equipment

Used in heavy machinery, presses, and industrial equipment, Grade 10.9 nuts ensure secure joints in rotating assemblies, gearboxes, and high-load mechanical linkages.

Wind & Renewable Energy

Critical for wind turbine tower flanges, nacelle assemblies, and solar mounting structures, where high-strength, fatigue-resistant fasteners are essential for long-term reliability.

Metric Grade 10.9 Nuts Standards & International Certifications

Metric Grade 10.9 Nuts 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 934 DIN 980 DIN 982 DIN 985 DIN 439 ISO 4032 ISO 7040 ASME B18.2.2 EN ISO 4032 IS 1363 IS 1364 SAE J995 SAE J1199 UNI 5588 CSN 021123 PN 82144

Certifications

ISO 9001:2015CE MarkingEN 10204 3.1 / 3.2PED 2014/68/EURoHS Compliant

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

Partner with RealBolt — India’s leading manufacturer of certified Metric Grade 10.9 Nuts — 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.

Answers for Buyers

Metric Grade 10.9 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Metric Grade 10.9 Nuts 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 nuts selection and pricing.

What standards do Metric Grade 10.9 nuts comply with?

Metric Grade 10.9 nuts are manufactured to ISO 898-2 and EN 20898-2 for mechanical properties, with dimensional standards including ISO 4032 (hex), ISO 4033 (heavy hex), and DIN 934. Inch series nuts are available to ASME B18.2.2. All nuts are supplied with EN 10204 3.1 certification and full traceability.

Can Metric Grade 10.9 nuts be used with stainless steel bolts?

It is not recommended to use Grade 10.9 nuts with stainless steel bolts due to differences in mechanical properties and risk of galvanic corrosion. Always pair Grade 10.9 nuts with matching Grade 10.9 or 10.9-class bolts for optimal joint performance and safety.

What finishes are available for Metric Grade 10.9 nuts?

Metric Grade 10.9 nuts are available in plain (self-color), zinc plated, hot dip galvanized, Geomet, and Dacromet finishes. The choice of finish depends on the application environment and corrosion protection requirements. Consult our team for the best option for your project.

Are Metric Grade 10.9 nuts suitable for outdoor or corrosive environments?

For outdoor or corrosive environments, specify hot dip galvanized or Geomet-coated Grade 10.9 nuts. These finishes provide enhanced corrosion resistance compared to plain or zinc-plated nuts. For extreme conditions, consider stainless steel or coated alternatives.

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

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