Home » DIN 7984 Low Head Socket Cap Screw Grade 8.8 Zinc CR3

DIN 7984 Low Head Socket Cap Screw Grade 8.8 Zinc CR3

FULLERKREG DIN 7984 Grade 8.8 Zinc CR3 Low Head Socket Cap Screws

FULLERKREG DIN 7984 Grade 8.8 Zinc CR3 Low Head Socket Cap Screws are medium-strength fasteners with an electroplated zinc coating using trivalent chromate (CR3) passivation. The CR3 zinc plating process is fully RoHS compliant — free from hexavalent chromium (Cr6+) and other restricted hazardous substances — making these screws the preferred choice for electronics, automotive, and consumer product applications subject to EU RoHS and REACH regulations. The low-profile DIN 7984 head design makes them ideal for confined-space assemblies.

Product Specifications

  • Standard: DIN 7984
  • Strength Grade: 8.8
  • Material: 10B21 boron steel or 35# carbon steel
  • Tensile Strength: Min. 800 MPa
  • Yield Strength: Min. 640 MPa
  • Hardness: HRC 22–32
  • Surface Treatment: Zinc electroplating with CR3 trivalent chromate passivation
  • Plating Thickness: Typically 5–12 μm zinc
  • RoHS Compliance: ✅ Fully compliant — no hexavalent chromium (Cr6+)
  • Thread Tolerance: 6g
  • Drive Type: Hexagon socket (Allen key)
  • Sizes Available: M3 – M20

RoHS Compliance — CR3 Trivalent Chromate Zinc Plating

The zinc CR3 coating on FULLERKREG DIN 7984 Grade 8.8 screws uses trivalent chromium (Cr3+) passivation, which replaces the traditional hexavalent chromium (Cr6+) process. This is a critical distinction for compliance with international environmental regulations:

Regulation Requirement CR3 Zinc Compliance
EU RoHS Directive (2011/65/EU) No hexavalent chromium (Cr6+) ✅ Compliant
EU REACH Regulation No SVHC restricted substances ✅ Compliant
ELV Directive (2000/53/EC) No Cr6+ in vehicle components ✅ Compliant
China RoHS (GB/T 26572) No restricted hazardous substances ✅ Compliant

Material — 10B21 Boron Steel / 35# Carbon Steel Chemical Composition (%)

FULLERKREG DIN 7984 Grade 8.8 Zinc CR3 low head cap screws are manufactured from 10B21 boron-alloyed steel or 35# medium carbon steel. 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
35# Steel 0.32–0.39 0.17–0.37 0.50–0.80 ≤0.035 ≤0.035 —

Mechanical Properties — Grade 8.8 (DIN 7984)

The following mechanical properties apply to FULLERKREG DIN 7984 Grade 8.8 Zinc CR3 low head socket cap screws per ISO 898-1 requirements.

Property Requirement Unit
Tensile Strength (Rm) Min. 800 MPa
Yield Strength / Proof Load Stress (Rp0.2) Min. 640 MPa
Core Hardness 22–32 HRC
Surface Hardness (max) ≤36 HRC
Elongation after fracture (A) Min. 12 %
Reduction of area (Z) Min. 52 %
Thread Tolerance Class 6g —
Plating Zinc CR3 (trivalent chromate) —

Key Features

  • ✅ RoHS & REACH Compliant — CR3 trivalent chromate zinc plating contains no hexavalent chromium (Cr6+), fully meeting EU RoHS, REACH, ELV, and China RoHS requirements
  • Low profile head — reduced head height vs. DIN 912, ideal for space-constrained assemblies
  • Grade 8.8 strength — reliable medium-strength performance for general industrial use
  • Zinc CR3 coating — superior corrosion resistance vs. black oxide; bright silver appearance
  • 10B21 boron steel / 35# carbon steel — consistent mechanical properties and good machinability
  • Environmentally responsible — manufactured without hazardous hexavalent chromium in the plating process
  • ISO/TS16949 quality management — hardness test, tensile test, salt spray test, and PPAP report available on request

Applications

FULLERKREG DIN 7984 Grade 8.8 Zinc CR3 low head cap screws are widely used in RoHS-regulated and general industrial applications:

  • Electronics and electrical equipment (EU RoHS regulated)
  • Automotive components and EV (electric vehicle) assemblies
  • Consumer electronics and home appliances
  • Medical devices and laboratory equipment
  • Industrial machinery requiring corrosion-resistant, environmentally compliant fasteners
  • Thin-panel and confined-space assemblies
  • Any application requiring RoHS-compliant zinc-plated fasteners

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 8.8 Zinc CR3 fasteners are manufactured under strict quality control procedures including:

  • Rockwell hardness test (HRC 22–32)
  • Tensile strength test (min. 800 MPa)
  • Salt spray corrosion test (zinc CR3 plating)
  • RoHS substance verification — no hexavalent chromium (Cr6+)
  • 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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