Home » DIN 934 Hex Nut – Zinc Grade 8

DIN 934 Hex Nut – Zinc Grade 8

DIN 934 Hex Nut — Medium Carbon Steel, Zinc Plated (Cr3), Class 8

FULLERKREG DIN 934 Class 8 Hexagon Nuts in medium carbon steel with zinc plating (Cr3, trivalent chromium passivation) are engineered for high-strength structural and mechanical fastening applications. Manufactured to the full dimensional requirements of DIN 934 / ISO 4032 at strength Class 8, these nuts deliver superior clamping force, excellent fatigue resistance, and reliable corrosion protection — making them the preferred choice for demanding industrial, automotive, and structural assemblies where Class 4 or Class 6 nuts are insufficient.

  • Material: Medium Carbon Steel (quenched & tempered)
  • Surface Treatment: Zinc Plated, Trivalent Chromium Passivation (Zinc Cr3)
  • Strength Class: Class 8 (ISO 898-2)
  • Standard: DIN 934 / ISO 4032
  • Thread: Metric Coarse (ISO 68-1)
  • Size Range: M1.6 – M64
  • Drive Type: Hexagon (6-sided)
  • Mating Bolt Class: 8.8
  • RoHS Compliant: Yes — Cr3 (trivalent) passivation, hexavalent chromium-free

Dimensional Data — DIN 934 Hex Nut Zinc Class 8

All dimensions in millimeters (mm). Tolerances per DIN 934 / ISO 4032. Unit weight is a theoretical reference value based on medium carbon steel density (7.85 g/cm³), excluding coating.

Thread
d		 Pitch
p (mm)		 Width Across Flats
s (mm)		 Width Across Corners
e (mm)		 Nut Height
m (mm)		 Unit Weight
(g/pc)
M1.6 0.35 3.20 3.70 1.30 0.07
M2 0.40 4.00 4.62 1.60 0.13
M2.5 0.45 5.00 5.77 2.00 0.26
M3 0.50 5.50 6.35 2.40 0.36
M3.5 0.60 6.00 6.93 2.80 0.54
M4 0.70 7.00 8.08 3.20 0.83
M5 0.80 8.00 9.24 4.00 1.58
M6 1.00 10.00 11.55 5.00 3.06
M8 1.25 13.00 15.01 6.50 6.72
M10 1.50 17.00 19.64 8.00 13.30
M12 1.75 19.00 21.94 10.00 21.70
M14 2.00 22.00 25.40 11.00 34.60
M16 2.00 24.00 27.71 13.00 51.40
M18 2.50 27.00 31.18 15.00 79.10
M20 2.50 30.00 34.64 16.00 106.80
M22 2.50 32.00 36.95 18.00 146.20
M24 3.00 36.00 41.57 19.00 193.80
M27 3.00 41.00 47.34 22.00 291.50
M30 3.50 46.00 53.12 24.00 414.80
M33 3.50 50.00 57.74 26.00 553.60
M36 4.00 55.00 63.51 29.00 751.20
M39 4.00 60.00 69.28 31.00 968.40
M42 4.50 65.00 75.06 34.00 1264.00
M45 4.50 70.00 80.83 36.00 1601.00
M48 5.00 75.00 86.60 38.00 1994.00
M52 5.00 80.00 92.38 42.00 2645.00
M56 5.50 85.00 98.15 45.00 3308.00
M60 5.50 90.00 103.92 48.00 4050.00
M64 6.00 95.00 109.70 51.00 4942.00

Selection Guide — DIN 934 vs. Related Hex Nut Standards

Standard Profile Height Chamfer Typical Use
DIN 934 / ISO 4032 Standard hex Normal (≈0.8d) Both faces General fastening — most common
DIN 439 / ISO 4035 Thin hex Low (≈0.5d) Both faces Jam nut / lock nut applications
DIN 6915 / ISO 7042 All-metal prevailing torque Normal Both faces Vibration-resistant joints
DIN 985 / ISO 10511 Nylon insert lock nut Higher One face Vibration / reusable locking
DIN 936 Hexagon thin nut Very low (≈0.4d) Both faces Adjustment / fine-pitch applications

Strength Class Comparison — Carbon Steel Hex Nuts

Property Class 4 Class 6 Class 8 Class 10
Proof Load Stress 510 MPa 600 MPa 800 MPa 1040 MPa
Material Low carbon steel Med. carbon steel Med. carbon steel (Q&T) Alloy steel
Mating Bolt Class 3.6 / 4.6 / 4.8 5.6 / 5.8 / 6.8 8.8 10.9
Hardness Range 110–200 HV 150–302 HV 200–302 HV 272–353 HV
Typical Application Light-duty general General structural High-strength structural Heavy structural / automotive

Zinc Plating (Cr3) — Surface Treatment Details

FULLERKREG applies electrolytic zinc plating with trivalent chromium (Cr3) passivation to all Class 8 DIN 934 hex nuts. This RoHS-compliant process delivers:

  • ✅ Coating Thickness: 5–12 μm zinc layer (per ISO 4042)
  • ✅ Salt Spray Resistance: ≥ 72 hours to white rust; ≥ 120 hours to red rust (ISO 9227)
  • ✅ Appearance: Bright silver-blue finish
  • ✅ RoHS / ELV Compliant: Hexavalent chromium-free (Cr3 passivation only)
  • ✅ Hydrogen Embrittlement: De-embrittlement baking applied post-plating for Class 8 per ISO 4042
  • ✅ Thread Fit: Coating thickness accounted for in thread tolerance; 6H/6g fit maintained

Standard Specification

FULLERKREG DIN 934 Class 8 hex nuts are manufactured to the full dimensional and mechanical requirements of DIN 934 / ISO 4032 and ISO 898-2. Key specification points:

  • Thread tolerance: 6H per ISO 965-1
  • Mechanical properties: Class 8 per ISO 898-2 (proof load stress 800 MPa)
  • Hardness: 200–302 HV (ISO 898-2)
  • Dimensional tolerance: Grade A for M1.6–M16; Grade B for M18–M64
  • Surface coating: Electrolytic zinc + Cr3 passivation per ISO 4042
  • De-embrittlement: Baking at 200°C for ≥ 4 hours post-plating (ISO 4042 Annex A)

Mechanical Properties — Class 8, Medium Carbon Steel

Property Value Standard
Proof Load Stress 800 MPa ISO 898-2
Hardness 200 – 302 HV ISO 898-2
Mating Bolt Class 8.8 ISO 898-2
Material Condition Quenched & Tempered (Q&T) —
Density 7.85 g/cm³ —
Operating Temperature -50°C to +300°C —

Chemical Composition — Medium Carbon Steel

Element C (Carbon) Mn (Manganese) P (Phosphorus) S (Sulfur) Si (Silicon)
Medium Carbon Steel 0.25–0.55% 0.50–1.65% ≤0.045% ≤0.045% ≤0.40%

Typical Applications

  • 🏗️ Structural Steel Construction — Steel frames, bridges, heavy-duty bolted connections requiring Class 8.8 bolt assemblies
  • 🚗 Automotive & Heavy Vehicles — Chassis, suspension, drivetrain, and engine mounting assemblies
  • 🔧 Industrial Machinery — Presses, compressors, pumps, gearboxes, and high-load equipment
  • ⚡ Power Generation & Energy — Wind turbine towers, generator frames, transformer mounting
  • 🚧 Infrastructure & Civil Engineering — Bridges, tunnels, rail infrastructure, heavy civil structures

Product Gallery — DIN 934 Hex Nut Zinc Class 8

       

Why Choose FULLERKREG?

  • 🏭 Direct Manufacturer — No middlemen; factory-direct pricing on all standard and custom sizes
  • 📐 Strict Dimensional Control — 100% thread gauge inspection; CMM verification on critical dimensions
  • 🔬 Material Traceability — Full mill certificates (MTC) and coating reports available per batch
  • 📦 Flexible MOQ & Packaging — Bulk bags, small boxes, or custom packaging; MOQ from 100 pcs
  • 🌍 Global Shipping — Export experience to 50+ countries; DDP/FOB/CIF terms available
  • ⚡ Fast Lead Times — Standard sizes in stock; custom sizes within 15–25 business days
  • 📋 Full Documentation — CoC, MTC, RoHS, REACH compliance documents on request
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