DIN 912 Socket Head Cap Screws – Specification, Dimensions & Applications

What is DIN 912?

DIN 912 is the international standard that defines the dimensions, tolerances and mechanical properties of socket head cap screws with an internal hex drive.

DIN 912 fasteners are widely used in engineering and industrial applications due to their high tensile strength, compact head design and reliable clamping force.

Unlike traditional hex bolts, socket head cap screws use a cylindrical head with an internal hex socket, allowing installation with a hex key or Allen wrench. This design makes them ideal for applications where space is limited or higher tightening torque is required.

DIN 912 socket head cap screws are commonly used in:

• industrial machinery

• automotive manufacturing

• mechanical assemblies

• heavy equipment

• precision tooling

Because of their strength and compact design, they are one of the most widely used metric fasteners in engineering and fabrication industries.

DIN 912 Specification Overview

DIN 912 is closely aligned with ISO 4762, which is the modern international equivalent standard.

DIN 912 Dimensions Chart

The table below shows typical dimensions for common metric socket head cap screw sizes.

These dimensions ensure consistent compatibility across mechanical assemblies and industrial equipment.

Material Grades for DIN 912 Screws

DIN 912 socket head cap screws are typically manufactured in high tensile alloy steel grades, which provide excellent strength and durability.

Grade 8.8

Medium strength fasteners commonly used in general engineering and equipment assemblies.

Grade 10.9

High strength bolts designed for demanding industrial and structural applications.

Grade 12.9

Very high tensile fasteners used in heavy machinery and high load mechanical systems.

Higher strength grades allow socket head cap screws to achieve greater clamping force and improved fatigue resistance.

Applications of DIN 912 Socket Head Cap Screws

DIN 912 fasteners are widely used across multiple industries due to their strength and compact head design.

Typical applications include:

Industrial Machinery

Used in machine frames, assemblies and equipment where high strength fasteners are required.

Automotive Components

Commonly used in engine assemblies, suspension systems and mechanical components.

Precision Engineering

Socket head screws are often used in tooling and precision equipment where accurate fastening and compact design are critical.

Structural Fabrication

In steel fabrication, these fasteners provide strong clamping force while maintaining a clean and compact profile.

Advantages of Socket Head Cap Screws

DIN 912 socket head screws offer several advantages compared with traditional hex bolts.

• Higher tensile strength

• Compact head design

• Ability to apply higher tightening torque

• Suitable for confined spaces

• Clean and professional appearance

These characteristics make them ideal for industrial machinery and high performance mechanical assemblies.

DIN 912 vs DIN 7991 Screws

While both fasteners use an internal hex drive, they serve different purposes.

DIN 7991 screws sit flush with the material surface, whereas DIN 912 screws provide greater head strength and torque capability.

Shop Socket Head Cap Screws

Konnect Fastening Systems supplies a wide range of metric socket head cap screws suitable for industrial, engineering and construction applications.

Available sizes include:

• M6 socket head cap screws

• M8 socket head cap screws

• M10 socket head cap screws

• M12 socket head cap screws

• M16 socket head cap screws

All fasteners are sourced from trusted manufacturers and meet international engineering standards.

Frequently Asked Questions

What is DIN 912?

DIN 912 is the standard that specifies the dimensions and mechanical properties of metric socket head cap screws with an internal hex drive.

What is the difference between DIN 912 and ISO 4762?

ISO 4762 is the international equivalent of DIN 912 and specifies the same socket head cap screw design and dimensions.

What hex key is used for DIN 912 screws?

The hex key size depends on the screw diameter. For example, an M8 socket head cap screw uses a 6 mm hex key.

See Also:

• DIN 7991 Countersunk Socket Screws Guide

• Metric Bolt Torque Chart

• Bolt Grades Explained

• Metric Bolt Size Chart