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For that extra margin of safety, the Grade 12.9 Hex Head Bolts specification outperforms the standard 10.9-grade bolts in terms of tensile strength characteristics by approximately 25 percent. Therefore, these Carbon Steel 12.9 Bolts are very well known for their characteristics of great tensile strength.

These Carbon Steel 12.9 Bolts perform very well even in unfavorable environments such as environments bound with acidic and alkaline mediums. These Carbon Steel 12.9 Bolts also possess excellent mechanical properties. Also, these have the characteristics of being flexible. These Carbon Steel 12.9 Bolts prove all of their properties even in harsh environments. These are also resistant to corrosion and are easy to install. These Carbon Steel 12.9 Bolts are durable and also serve for a long time.

These Class 12.9 Hex Nut are manufactured from high-quality raw materials so that the best quality products are manufactured. In addition, all of the industry standards and regulations and the necessary rules and regulations are taken into account when manufacturing these Carbon Steel 12.9 Bolts, resulting in high-quality Carbon Steel 12.9 Bolts.

The Class 12.9 Hex Head Bolts could be available in different shapes, sizes, and dimensions, depending upon the specifications and requirements provided by the client and the need of the application. These Carbon Steel 12.9 Bolts undergo a series of tests to test and improve their quality, and these tests include chemical tests, mechanical tests, hardness tests, and so on. Because of all the properties and characteristics that these fasteners have they are used in a large number of industrial applications such as Oil and Gas Processing, Chemical industries, Paper and Pulp industries, etc.

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Specification :-

Specifications of Carbon Steel 12.9 Bolts ASTM F593, F594, F1554 / ASME SF593, F594, F1554
Standard DIN : DIN 934, DIN 931, DIN 970, DIN 933
ISO : JIS standards, ISO 4033, ISO 4032,
ANSI – American National Standards Institute
ASME B18.5
ANSI B 28.2.4 1M
as per defined in ASME B16.5 standard length
ANSI B 18.2.4 2M
as per defined in ASME B18.2.2
Size M3 - M56 | 3/6" to 2" | Custom Sizes
Length 3 mm to 200 mm | Custom Sizes
Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Form Hex, Threading, Square, Round as per Gauge Etc.
Threads Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or
Threads available UNF, BSW, BSF, METRIC, UNC, or as required
ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Certification Dual Certified As per ASTM & ASME Codes
Test Certificate As per EN 10204 / 3.1 Manufacturer Test Certificate, PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Raw materials Source JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc.
Packing IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request
Surface Coating Cadmium Coating
Hot Dipped Galvanizing Coating
Ptfe Coated
Phosphate Coating
Teflon Coating
Xylon Coating
Zinc Coating

Equivalent of Grade


Chemical Composition

Grade C P S B
Carbon Steel 12.9 0.28-0.5 0.025 0.025 0.003

Mechanical Properties

Element Nominal thread diameter size range [mm] Proof strength [MPa] Yield strength (min) [MPa] Tensile strength (min) [MPa] Hardness [Rockwell]
Carbon Steel 12.9 1.6–100 970 1100 1220 C39–44

Applications and Uses

  • Chemical Industries
  • Oil & Gas Industrires
  • Power Plant Industries
  • Shipbuilding Industries
  • Fertilizer Industrires
  • Petrochemical Industrires
  • Sugar Industrires
  • Cement Industrires