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DIN 7991 Hexagon Socket Countersunk Head Screws – Manufacturer, Exporter & Supplier

We manufacture and export DIN 7991 Hexagon Socket Countersunk Head Screws conforming to exact DIN 7991 dimensional and mechanical specifications. Available in 8.8 / 10.9 / 12.9 / A2-70 / A4-70, our DIN 7991 socket screws 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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View Standards

DIN 7991 Key Specifications

The core specification data for DIN 7991 Hexagon Socket Countersunk Head Screws, at a glance.

Standard

DIN 7991

Type

Hexagon Socket Countersunk Head Screws

Size Range

M3 to M20

Thread Pitch

Coarse

Property Class / Grade

8.8 / 10.9 / 12.9 / A2-70 / A4-70

Head / Drive Type

Hex Socket / Flat Countersunk

About DIN 7991 Hexagon Socket Countersunk Head Screws

DIN 7991 Hexagon Socket Countersunk Head Screws are socket screws produced and tested to the exact requirements of the DIN 7991 specification. Featuring a Hex Socket / Flat Countersunk configuration with Coarse thread form, they are available in property classes 8.8 / 10.9 / 12.9 / A2-70 / A4-70 across a size range of M3 to M20. The DIN 7991 standard governs dimensional tolerances, mechanical properties including tensile strength, proof load and hardness, as well as surface finish requirements to ensure dependable performance in Machinery and Automation applications worldwide.
Our DIN 7991 Hexagon Socket Countersunk Head Screws 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 Tooling, Aerospace Sub-Tier and Robotics applications. As a global exporter of DIN 7991 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 Alloy / Stainless Steel

Country of Origin

India

Standard Body

DIN

Corrosion Resistance

Salt-spray tested to relevant grade

Recommended Torque

Per property class / grade

Storage Conditions

Dry, corrosion-inhibited packing

DIN 7991 Dimensions & Size Chart

Precise dimensional data for every DIN 7991 Hexagon Socket Countersunk Head Screws size, cross-referenced against the standard’s key measurement points.
Size (M)dk (mm)k (mm)s (mm)L Range (mm)
M36.721.862.05–30
M48.962.482.56–40
M511.203.103.08–50
M613.443.724.010–60
M817.924.965.012–80
M1022.406.206.016–100
M1226.887.448.020–120
M1633.608.8010.025–150
M2040.3210.1612.030–180
Key Dimension Callouts

d

Nominal thread diameter measured across the major thread.

l

Overall screw length from head top to thread end.

dk

Countersunk head diameter at the top bearing edge.

s

Hexagon socket width across flats for key engagement.

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DIN 7991 Hexagon Socket Countersunk Head Screws – Material Grades & Property Classes

DIN 7991 Hexagon Socket Countersunk Head Screws are available across multiple property classes and surface finish options to match load-bearing and corrosion-resistance requirements for Machinery, Automation and Tooling applications.
Property Classes
8.8 10.9 12.9 A2-70 A4-70
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 DIN 7991 Hexagon Socket Countersunk Head Screws?

Nine reasons buyers worldwide rely on us as their DIN 7991 Hexagon Socket Countersunk Head Screws manufacturer and export partner.
ISO Certified Production

Every batch of DIN 7991 Hexagon Socket Countersunk Head Screws 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 DIN 7991 Hexagon Socket Countersunk Head Screws shipment.

48-hr Dispatch on Stock Items

Commonly stocked DIN 7991 Hexagon Socket Countersunk Head Screws 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 DIN 7991 Hexagon Socket Countersunk Head Screws to buyers in over 50 countries worldwide.

Custom Sizes & Lengths

Non-standard DIN 7991 Hexagon Socket Countersunk Head Screws lengths, diameters and special thread pitches are produced to order to match your drawing requirements.

Competitive Factory Pricing

Direct-from-factory pricing on DIN 7991 Hexagon Socket Countersunk Head Screws with no middleman markup, offering the best value on volume and repeat orders.

In-House Metallurgical Testing

Hardness, tensile strength and dimensional checks for DIN 7991 Hexagon Socket Countersunk Head Screws are performed in our in-house laboratory before every release.

Consolidated Multi-Standard Shipping

Combine DIN 7991 Hexagon Socket Countersunk Head Screws 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 DIN 7991 Hexagon Socket Countersunk Head Screws export order.

DIN 7991 Hexagon Socket Countersunk Head Screws – Applications & End Uses

DIN 7991 Hexagon Socket Countersunk Head Screws are widely specified across multiple industries. Select an industry below to see how our DIN 7991 socket screws are applied.
DIN 7991 Hexagon Socket Countersunk Head Screws are used in machinery for critical fastening applications where dimensional accuracy and mechanical performance are essential. Grade 8.8 is most commonly specified for machinery environments.
In automation, DIN 7991 Hexagon Socket Countersunk Head Screws are valued for consistent dimensions and reliable load-bearing capability. We supply with full test documentation to support quality audits and project inspections.
DIN 7991 Hexagon Socket Countersunk Head Screws are used in tooling assemblies where precise torque control and consistent fit are critical. We supply to OEM manufacturers and contractors with custom packaging formats.
For aerospace sub-tier applications, DIN 7991 Hexagon Socket Countersunk Head Screws are supplied with material test reports, dimensional inspection certificates and PPAP documentation where required.
DIN 7991 Hexagon Socket Countersunk Head Screws for robotics use are selected from stainless steel or coated grades to provide appropriate corrosion resistance while maintaining specified mechanical performance.
In general engineering applications, DIN 7991 Hexagon Socket Countersunk Head Screws are fastened into assemblies requiring long-term reliability. Our export-packaged DIN 7991 socket screws arrive protected from transit corrosion with full documentation.

Request a Quote for DIN 7991 Hexagon Socket Countersunk Head Screws

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 DIN 7991

Common questions from buyers sourcing DIN 7991 Hexagon Socket Countersunk Head Screws, covering sizes, grades, documentation and lead times.
We supply DIN 7991 Hexagon Socket Countersunk Head Screws from M3 to M20 in Coarse thread. Standard lengths are stocked; non-standard lengths are produced to order. Contact us with your exact requirements for availability confirmation.
DIN 7991 Hexagon Socket Countersunk Head Screws are supplied in 8.8 / 10.9 / 12.9 / A2-70 / A4-70. 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 DIN 7991 Hexagon Socket Countersunk Head Screws 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 DIN 7991 Hexagon Socket Countersunk Head Screws 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
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  • Mumbai
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Countries We Export To:

  • US
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