Home » DIN 7984 Low Head Socket Cap Screw Grade 12.9

DIN 7984 Low Head Socket Cap Screw Grade 12.9

FULLERKREG DIN 7984 Grade 12.9 Low Head Socket Cap Screws

FULLERKREG DIN 7984 Grade 12.9 Low Head Socket Cap Screws are high-tensile, industrial-grade fasteners designed for applications where standard socket cap screw head height is too tall. The reduced head profile makes them ideal for confined spaces, thin panels, and precision assemblies in automotive, robotics, machinery, and electronics industries.

Product Specifications

  • Standard: DIN 7984
  • Strength Grade: 12.9
  • Material: Alloy steel SCM440 (chromium-molybdenum)
  • Tensile Strength: Min. 1,220 MPa
  • Yield Strength: Min. 1,100 MPa
  • Hardness: HRC 39–44
  • Surface Treatment: Black oxide coating
  • Thread Tolerance: 5g6g
  • Drive Type: Hexagon socket (Allen key)
  • Sizes Available: M3 – M20

Material — SCM440 Alloy Steel Chemical Composition (%)

FULLERKREG DIN 7984 Grade 12.9 low head cap screws are manufactured from SCM440 chromium-molybdenum alloy steel. All values are maximum unless a range is indicated.

Grade C Si Mn P (max) S (max) Cr Mo
SCM440 0.38–0.43 0.15–0.35 0.60–0.85 ≤0.030 ≤0.030 0.90–1.20 0.15–0.30

Mechanical Properties — Grade 12.9 (DIN 7984)

The following mechanical properties apply to FULLERKREG DIN 7984 Grade 12.9 low head socket cap screws per ISO 898-1 and DIN 7984 standard requirements.

Property Requirement Unit
Tensile Strength (Rm) Min. 1,220 MPa
Yield Strength / Proof Load Stress (Rp0.2) Min. 1,100 MPa
Core Hardness 39–44 HRC
Surface Hardness (max) ≤50 HRC
Elongation after fracture (A) Min. 8 %
Reduction of area (Z) Min. 44 %
Impact energy (KV) at room temp. Min. 27 J
Thread Tolerance Class 5g6g —

Key Features

  • Low profile head — reduced head height vs. DIN 912, ideal for space-constrained assemblies
  • High tensile strength — Grade 12.9 rated, suitable for high-stress industrial applications
  • SCM440 alloy steel — superior strength and toughness vs. standard carbon steel
  • Black oxide finish — enhanced corrosion resistance and professional appearance
  • ISO/TS16949 quality management — Salt spray test, hardness test, tensile test, and PPAP report available on request

Applications

FULLERKREG DIN 7984 Grade 12.9 low head cap screws are widely used in:

  • Automotive components and engine assemblies
  • Robotics and automation equipment
  • Precision machinery and CNC equipment
  • Electronics enclosures and thin-panel assemblies
  • Hydraulic and pneumatic systems
  • Wind power and energy equipment

Dimensional Specifications — DIN 7984 (Unit: mm)

Thread (d) Pitch (p) Head Dia. dk Max. Head Dia. dk Min. Head Height k Max. Head Height k Min. Key Size s Key Depth t Min. Body Dia. ds Max. Body Dia. ds Min.
M3 0.5 5.68 5.32 1.65 1.35 2 0.7 3.00 2.86
M4 0.7 7.22 6.78 2.20 1.80 2.5 1.0 4.00 3.82
M5 0.8 8.72 8.28 2.75 2.25 3 1.1 5.00 4.82
M6 1.0 10.22 9.78 3.30 2.70 4 1.4 6.00 5.82
M8 1.25 13.27 12.73 4.40 3.60 5 2.0 8.00 7.78
M10 1.5 16.27 15.73 5.50 4.50 6 2.5 10.00 9.78
M12 1.75 18.27 17.73 6.60 5.40 8 3.0 12.00 11.73
M14 2.0 21.33 20.67 7.70 6.30 10 3.5 14.00 13.73
M16 2.0 24.33 23.67 8.80 7.20 10 4.0 16.00 15.73
M20 2.5 30.33 29.67 11.00 9.00 12 5.0 20.00 19.67

Comparison: DIN 7984 vs DIN 912 Head Height (mm)

Thread Size DIN 7984 Head Height (k) DIN 912 Head Height (k) Height Reduction
M3 1.5 3.0 −50%
M4 2.0 4.0 −50%
M5 2.5 5.0 −50%
M6 3.0 6.0 −50%
M8 4.0 8.0 −50%
M10 5.0 10.0 −50%
M12 6.0 12.0 −50%
M16 8.0 16.0 −50%
M20 10.0 20.0 −50%

Packaging & Availability

  • Standard sizes M3 – M20 available in stock
  • Bulk carton packaging; custom packaging available
  • Custom lengths and special requirements accepted for large orders
  • PPAP report, material certificate, and test reports available on request

Download Price & Packaging Information

Quality Assurance

All FULLERKREG DIN 7984 Grade 12.9 fasteners are manufactured under strict quality control procedures including:

  • Salt spray corrosion test
  • Rockwell hardness test (HRC 39–44)
  • Tensile strength test (min. 1,220 MPa)
  • Dimensional inspection per DIN 7984
  • PPAP documentation available upon request

For wholesale pricing, bulk orders, or technical inquiries, please contact our sales team.

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