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Weld Nuts (DIN 929) - Stainless Steel (A2)

Weld Nuts (DIN 929) — Stainless Steel A2 (SUS304)

FULLERKREG DIN 929 hexagon weld nuts are precision-manufactured to the German DIN 929 standard in A2 stainless steel (SUS304). Designed for resistance welding applications, each nut features three integral welding projections on the bearing face that melt during the welding process to create a flush, high-strength bond with the base material. The passivated (acid-washed) surface finish enhances corrosion resistance and ensures clean, reliable weld contact. Available in thread sizes M3 through M16 for industrial, automotive, sheet-metal, and structural applications.

Dimensional Data

All dimensions in mm. Tolerances per DIN 929 / ISO 4042. Unit weight (g) is theoretical reference value for SUS304.

Thread
d		 Pitch
(mm)		 Nut Height
m (h14)		 Across Flats
s (h13)		 Across Corners
e (min)		 Spigot Dia.
d2 (tol d11)		 Spigot Proj.
h1 (tol)		 Weld Proj.
h2 (tol)		 Unit Weight
(g/pc)
M3 0.5 3.00 7.50 8.27 4.50 0.55 ±0.1 0.25 +0/-0.1 ~0.9
M4 0.7 3.50 9.00 9.91 6.00 0.65 ±0.1 0.35 +0/-0.1 ~1.6
M5 0.8 4.00 10.00 11.05 7.00 0.70 ±0.1 0.40 +0/-0.1 ~2.3
M6 1.0 5.00 11.00 12.12 8.00 0.75 ±0.15 0.50 +0/-0.1 ~3.8
M8 1.25 6.50 14.00 15.44 10.50 0.90 ±0.15 0.50 +0/-0.15 ~7.5
M10 1.5 8.00 17.00 18.72 12.50 1.15 ±0.2 0.65 +0/-0.15 ~14.2
M12 1.75 10.00 19.00 20.88 14.80 1.40 ±0.2 0.80 +0/-0.2 ~22.5
M14 2.0 10.00 19.00 20.88 14.80 1.40 ±0.2 1.00 +0/-0.2 ~24.8
M16 2.0 10.00 24.00 26.75 18.80 1.80 ±0.2 1.00 +0/-0.2 ~38.0

* Across Corners (e) calculated from s × 1.155. Unit weights are theoretical reference values; actual weights may vary ±5%. M14 has limited availability — higher MOQ applies.

Selection Guide

Parameter Specification
Standard DIN 929
Material Stainless Steel A2 (SUS304 / 1.4301)
Surface Treatment Acid-washed (Passivated / Bright Finish)
Thread Type Metric coarse thread (ISO 68-1)
Thread Tolerance 6H
Nut Height Tolerance h14
Across Flats Tolerance h13
Spigot Diameter Tolerance d11
Welding Projections 3 projections, symmetrically arranged
Welding Method Resistance spot welding
Thread Size Range M3 – M16
Hardness ≤ 250 HV (A2 per ISO 3506-2)
Tensile Strength ≥ 500 MPa
Operating Temperature -200°C to +300°C
RoHS Compliant Yes
Packaging Bulk bag / box; custom packaging available

Standard Notes

DIN 929 specifies hexagon weld nuts with three welding projections on the bearing face. The spigot (pilot) locates the nut precisely on the workpiece prior to welding. Upon resistance welding, the projections collapse and fuse with the base material, creating a flush, permanent joint. This standard is widely adopted in automotive body-in-white, appliance manufacturing, and sheet-metal fabrication. The A2 (SUS304) grade provides excellent corrosion resistance in atmospheric and mildly corrosive environments and is non-magnetic in the annealed condition.

  • DIN 929 — Hexagon weld nuts, metric coarse thread
  • Equivalent standards: ISO 21670 (Type B, hexagonal), JIS B 1196
  • Material grade: A2 per ISO 3506-2 (SUS304 / 1.4301)
  • Surface: Passivated (acid-washed bright finish) — no additional coating
  • Thread: Right-hand, metric coarse, tolerance class 6H

Product Gallery

DIN 929 Hex Weld Nuts — Stainless Steel A2 (SUS304) actual product photos:

[ Photo 1 ] [ Photo 2 ] [ Photo 3 ] [ Photo 4 ]

Chemical Composition — A2 Stainless Steel (SUS304 / 1.4301)

Grade C (%) Si (%) Mn (%) P (%) S (%) Cr (%) Ni (%)
SUS304 (A2) ≤ 0.08 ≤ 1.00 ≤ 2.00 ≤ 0.045 ≤ 0.030 18.0–20.0 8.0–10.5

Mechanical Properties — A2-70 (ISO 3506-2)

Property Class Proof Load Stress (MPa) Tensile Strength (MPa) Hardness (HV)
A2-70 ≥ 500 ≥ 700 147–220

Why Choose FULLERKREG DIN 929 Weld Nuts?

  • 🏭 Factory Direct — Manufactured in-house with full process control from raw material to finished part
  • 📐 Strict DIN 929 Compliance — Every dimension and tolerance verified against the standard; no substitutions
  • 🔬 Material Certified — Mill test certificates (MTC) available; SUS304 composition verified by spectrometer
  • 🌊 Corrosion Resistant — A2 passivated finish provides reliable performance in humid and mildly corrosive environments
  • ⚡ Weld-Ready Surface — Acid-washed bright finish ensures clean weld contact; no oil or coating interference
  • 📦 Bulk Wholesale Supply — MOQ-friendly pricing tiers; consistent lot quality for production lines
  • 🚢 Global Export Experience — Shipped worldwide with proper export documentation and packaging
  • 💬 Technical Support — Engineering team available for application guidance, custom sizes, and special requirements

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