Home » DIN 934 Hex Nut Low Carbon Steel – Zinc Class 4

DIN 934 Hex Nut Low Carbon Steel – Zinc Class 4

DIN 934 Hex Nut — Low Carbon Steel, Zinc Plated (Cr3), Class 4

FULLERKREG DIN 934 Hexagon Nuts in low carbon steel with zinc plating (Cr3, trivalent chromium passivation) are the most widely used general-purpose metric hex nuts in industrial and construction applications. Manufactured to the full dimensional requirements of DIN 934 / ISO 4032 at strength Class 4, these nuts offer reliable clamping performance, good corrosion protection, and outstanding cost-effectiveness for high-volume fastening needs.

  • Material: Low Carbon Steel (低碳锆)
  • Surface Treatment: Zinc Plated, Trivalent Chromium Passivation (Zinc Cr3 / 镇锌三价铬钒化)
  • Strength Class: Class 4 (ISO 898-2)
  • Standard: DIN 934 / ISO 4032
  • Thread: Metric Coarse (ISO 68-1)
  • Size Range: M1.6 – M64
  • Drive Type: Hexagon (6-sided)
  • RoHS Compliant: Yes — Cr3 (trivalent) passivation, hexavalent chromium-free

Dimensional Data — DIN 934 Hex Nut Low Carbon Steel Zinc Class 4

All dimensions in millimeters (mm). Tolerances per DIN 934 / ISO 4032. Single-piece weight (单重) is theoretical reference value based on low 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)		 单重
(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 Alloy steel
Mating Bolt Class 3.6 / 4.6 / 4.8 5.6 / 5.8 / 6.8 8.8 10.9
Typical Application Light-duty general use 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 4 DIN 934 hex nuts. This RoHS-compliant process replaces legacy hexavalent chromium (Cr6) treatments and 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)
  • ✅ Thread Fit: Coating thickness accounted for in thread tolerance; 6H/6g fit maintained

Standard Specification

FULLERKREG DIN 934 Class 4 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 4 per ISO 898-2 (proof load stress 510 MPa)
  • Hardness: 110–200 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

Mechanical Properties — Class 4, Low Carbon Steel

Property Value Standard
Proof Load Stress 510 MPa ISO 898-2
Hardness 110 – 200 HV ISO 898-2
Mating Bolt Class 3.6 / 4.6 / 4.8 ISO 898-2
Material Low carbon steel (低碳锆) —
Density 7.85 g/cm³ —
Operating Temperature -50°C to +300°C —

Chemical Composition — Low Carbon Steel

Element C (Carbon) Mn (Manganese) P (Phosphorus) S (Sulfur) Si (Silicon)
Low Carbon Steel ≤0.25% ≤1.20% ≤0.045% ≤0.045% ≤0.40%

Typical Applications

  • 🏗️ Construction & Civil Engineering — Steel structures, formwork, scaffolding, general building fastening
  • 🚗 Automotive & Transportation — Non-critical body panels, brackets, interior assemblies
  • 🔧 General Manufacturing — Machinery, equipment assembly, light-duty industrial fastening
  • 📦 Packaging & Logistics Equipment — Shelving, racking, conveyor systems
  • ⚡ Electrical Enclosures — Control panels, junction boxes, cable management

Product Gallery — DIN 934 Hex Nut Low Carbon Steel Zinc Class 4

       

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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