Home » DIN 7984 Low Head Socket Cap Screw Grade 10.9

DIN 7984 Low Head Socket Cap Screw Grade 10.9

FULLERKREG DIN 7984 Grade 10.9 Black Low Head Socket Cap Screws

FULLERKREG DIN 7984 Grade 10.9 Black Low Head Socket Cap Screws are high-strength fasteners manufactured from 10B21 boron-alloyed steel with a black oxide surface treatment. Grade 10.9 delivers significantly higher tensile strength than Grade 8.8, making these screws suitable for demanding structural and mechanical applications where both high clamping force and a low-profile head are required. The black oxide finish provides a professional appearance and is free from hazardous substances, meeting RoHS environmental requirements.

Product Specifications

  • Standard: DIN 7984
  • Strength Grade: 10.9
  • Material: 10B21 boron-alloyed steel
  • Tensile Strength: Min. 1,040 MPa
  • Yield Strength: Min. 940 MPa
  • Hardness: HRC 32–39
  • Surface Treatment: Black oxide (blackening)
  • RoHS Compliance: ✅ Compliant — black oxide process contains no hexavalent chromium (Cr6+) or other RoHS restricted substances
  • Thread Tolerance: 6g
  • Drive Type: Hexagon socket (Allen key)
  • Sizes Available: M3 – M20

RoHS Compliance

FULLERKREG DIN 7984 Grade 10.9 black low head cap screws are manufactured and surface-treated without the use of any RoHS-restricted hazardous substances. The black oxide process does not use hexavalent chromium (Cr6+), lead, mercury, cadmium, or other substances restricted under EU RoHS Directive 2011/65/EU.

Regulation Requirement Compliance Status
EU RoHS Directive (2011/65/EU) No Cr6+, Pb, Hg, Cd, PBB, PBDE ✅ Compliant
EU REACH Regulation No SVHC restricted substances ✅ Compliant
China RoHS (GB/T 26572) No restricted hazardous substances ✅ Compliant

Material — 10B21 Boron Steel Chemical Composition (%)

FULLERKREG DIN 7984 Grade 10.9 low head cap screws are manufactured exclusively from 10B21 boron-alloyed steel. The addition of boron (B) significantly improves hardenability, enabling Grade 10.9 mechanical properties to be achieved with a leaner alloy composition. All values are maximum unless a range is indicated.

Grade C Si (max) Mn P (max) S (max) B
10B21 0.18–0.23 ≤0.30 0.80–1.10 ≤0.030 ≤0.030 0.0005–0.003

Mechanical Properties — Grade 10.9 (DIN 7984)

The following mechanical properties apply to FULLERKREG DIN 7984 Grade 10.9 low head socket cap screws per ISO 898-1 requirements.

Property Requirement Unit
Tensile Strength (Rm) Min. 1,040 MPa
Yield Strength / Proof Load Stress (Rp0.2) Min. 940 MPa
Core Hardness 32–39 HRC
Surface Hardness (max) ≤44 HRC
Elongation after fracture (A) Min. 9 %
Reduction of area (Z) Min. 48 %
Impact energy (KV) at room temp. Min. 37 J
Thread Tolerance Class 6g —
Surface Treatment Black oxide (blackening) —

Key Features

  • ✅ RoHS Compliant — black oxide surface treatment contains no hexavalent chromium (Cr6+), lead, or other RoHS restricted substances
  • Low profile head — reduced head height vs. DIN 912, ideal for space-constrained assemblies
  • Grade 10.9 high strength — 1,040 MPa tensile strength, significantly stronger than Grade 8.8
  • 10B21 boron steel — excellent hardenability and consistent mechanical properties through heat treatment
  • Black oxide finish — professional appearance with moderate corrosion resistance
  • High clamping force — suitable for critical structural and mechanical joints
  • ISO/TS16949 quality management — hardness test, tensile test, salt spray test, and PPAP report available on request

Applications

FULLERKREG DIN 7984 Grade 10.9 black low head cap screws are widely used in high-strength applications:

  • Automotive structural components and chassis assemblies
  • Robotics and automation equipment requiring high clamping force
  • Precision machinery and CNC equipment
  • Wind power and energy generation equipment
  • Heavy machinery and industrial equipment
  • Hydraulic and pneumatic systems
  • Any application requiring Grade 10.9 strength with a low-profile head

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

Packaging & Availability

  • Standard sizes M3 – M20 available in stock
  • Bulk carton packaging; custom packaging available
  • RoHS compliance documentation and material certificates available on request
  • PPAP report and test reports available on request

Download Specification

Quality Assurance

All FULLERKREG DIN 7984 Grade 10.9 black fasteners are manufactured under strict quality control procedures including:

  • Rockwell hardness test (HRC 32–39)
  • Tensile strength test (min. 1,040 MPa)
  • Salt spray corrosion test
  • RoHS substance verification — no hexavalent chromium (Cr6+) or restricted substances
  • Dimensional inspection per DIN 7984
  • PPAP documentation available upon request

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

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