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DIN 934 Hex Nut A4 Stainless

DIN 934 Hex Nut — A4 Stainless Steel (SUS316)

FULLERKREG DIN 934 Hexagon Nuts in A4 stainless steel (SUS316) are manufactured to the full dimensional and mechanical requirements of DIN 934 / ISO 4032. With a passivated and bright-finished surface, these nuts deliver superior corrosion resistance — especially in chloride-rich, marine, and chemical environments where A2 (SUS304) is insufficient. Grade A4-80 provides higher strength than standard A2-70, making them the preferred choice for demanding structural and offshore applications.

  • Material: A4 Stainless Steel (SUS316 / 1.4401)
  • Surface Treatment: Passivated & Bright (钝化 / 洗白)
  • Strength Grade: A4-80
  • Standard: DIN 934 / ISO 4032
  • Thread: Metric Coarse (ISO 68-1)
  • Size Range: M1.6 – M64
  • Drive Type: Hexagon (6-sided)

Dimensional Data — DIN 934 Hex Nut A4 Stainless

All dimensions in millimeters (mm). Tolerances per DIN 934 / ISO 4032. Single-piece weight (单重) is theoretical reference value based on SUS316 density (7.98 g/cm³).

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 0.14
M2.5 0.45 5.00 5.77 2.00 0.28
M3 0.50 5.50 6.35 2.40 0.38
M3.5 0.60 6.00 6.93 2.80 0.56
M4 0.70 7.00 8.08 3.20 0.86
M5 0.80 8.00 9.24 4.00 1.63
M6 1.00 10.00 11.55 5.00 3.15
M8 1.25 13.00 15.01 6.50 6.90
M10 1.50 17.00 19.64 8.00 13.70
M12 1.75 19.00 21.94 10.00 22.40
M14 2.00 22.00 25.40 11.00 35.60
M16 2.00 24.00 27.71 13.00 52.90
M18 2.50 27.00 31.18 15.00 81.40
M20 2.50 30.00 34.64 16.00 109.90
M22 2.50 32.00 36.95 18.00 150.60
M24 3.00 36.00 41.57 19.00 199.40
M27 3.00 41.00 47.34 22.00 300.00
M30 3.50 46.00 53.12 24.00 427.00
M33 3.50 50.00 57.74 26.00 570.00
M36 4.00 55.00 63.51 29.00 773.00
M39 4.00 60.00 69.28 31.00 997.00
M42 4.50 65.00 75.06 34.00 1302.00
M45 4.50 70.00 80.83 36.00 1648.00
M48 5.00 75.00 86.60 38.00 2054.00
M52 5.00 80.00 92.38 42.00 2726.00
M56 5.50 85.00 98.15 45.00 3409.00
M60 5.50 90.00 103.92 48.00 4171.00
M64 6.00 95.00 109.70 51.00 5085.00

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

A4 vs. A2 — Which Stainless Grade Should You Choose?

Property A2 (SUS304) A4 (SUS316)
Strength Grade A2-70 A4-80
Min. Tensile Strength 700 MPa 800 MPa
Molybdenum Content None 2.0–3.0%
Chloride Resistance Moderate Excellent
Marine / Offshore Use Not recommended Recommended
Chemical / Acid Resistance Good Superior
Cost Lower Higher
Typical Applications General indoor/outdoor Marine, food, pharma, chemical

Standard Specification

DIN 934 (cross-referenced with ISO 4032) defines the dimensional and mechanical requirements for metric hexagon nuts with coarse pitch threads. FULLERKREG manufactures A4 grade nuts to the full DIN 934 specification. Key specification points:

  • Thread tolerance: 6H per ISO 965-1
  • Mechanical properties: A4-80 per ISO 3506-2 (min. tensile strength 800 MPa, min. proof load stress 640 MPa)
  • Hardness: 250 HV max (A4 grade)
  • Corrosion resistance: Passes 500-hour salt spray test (ISO 9227) in passivated condition
  • Dimensional tolerance: Grade A for M1.6–M16; Grade B for M18–M64

Mechanical Properties — A4-80 (SUS316)

Property Value Standard
Proof Load Stress 640 MPa ISO 3506-2
Min. Tensile Strength (Rm) 800 MPa ISO 3506-2
Min. Yield Strength (Rp0.2) 600 MPa ISO 3506-2
Hardness ≤ 250 HV ISO 3506-2
Elongation at Break ≥ 35% ISO 3506-2
Operating Temperature -200°C to +400°C —

Chemical Composition — A4 Stainless Steel (SUS316 / 1.4401)

Element C Si Mn P S Cr Ni Mo
SUS316 / 1.4401 ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 16.5–18.5 10.0–13.0 2.0–3.0

Product Gallery — DIN 934 Hex Nut A4 Stainless

       

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) available; SUS316 Mo content verified per heat
  • 📦 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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