Weld Nuts (DIN 929) — Q195 Low Carbon Steel, ISO Class 4, Bare

FULLERKREG DIN 929 hexagon weld nuts in Q195 low carbon steel at ISO Class 4 represent the most economical and weld-friendly option in the DIN 929 range. Manufactured to the DIN 929 standard, each nut features three symmetrically arranged welding projections on the bearing face that collapse and fuse with the base material during resistance welding, creating a flush, permanent joint. Q195 is a Chinese national standard (GB/T 700) low carbon structural steel with extremely low carbon content, delivering outstanding weldability, excellent ductility, and consistent resistance welding performance — making it the preferred choice for light-duty sheet-metal assemblies, HVAC, furniture, and consumer electronics enclosures where high mechanical strength is not the primary requirement. The bare (uncoated) surface is the standard delivery condition for applications where post-weld painting, powder coating, or e-coating will be applied. Available in thread sizes M3 through M16.

Dimensional Data

All dimensions in mm. Tolerances per DIN 929. Unit weight (g) is theoretical reference value for carbon steel (density 7.85 g/cm³).

* 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

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. Q195 is a GB/T 700 low carbon structural steel with a maximum carbon content of 0.12%, giving it the lowest carbon equivalent of all DIN 929 weld nut materials. This translates to the best resistance welding consistency, the lowest risk of heat-affected zone (HAZ) cracking, and the highest ductility — at the cost of lower mechanical strength compared to 10B21 grades. ISO Class 4 is the appropriate property class for this material and is widely used in light-duty sheet-metal, HVAC, furniture, and consumer electronics applications.

• DIN 929 — Hexagon weld nuts, metric coarse thread
• Material: Q195 low carbon structural steel (GB/T 700); approximate equivalent to S185 (EN 10025), A36 (ASTM)
• Property Class: ISO Class 4 per ISO 898-2
• Surface: Bare / uncoated mill finish — no plating, no coating
• Thread: Right-hand, metric coarse, tolerance class 6H
• Key advantage: Best weldability and lowest cost in the DIN 929 range; ideal for high-volume light-duty assemblies

Full Grade Comparison — DIN 929 Weld Nuts by Strength Class

Product Gallery

DIN 929 Hex Weld Nuts — Q195 Low Carbon Steel, ISO Class 4, Bare actual product photos:

Chemical Composition — Q195 Low Carbon Structural Steel (GB/T 700)

* Q195 has the lowest carbon content (≤ 0.12%) of all DIN 929 weld nut materials, resulting in the best weldability and ductility. Approximate international equivalents: S185 (EN 10025-2), A36 (ASTM A36), SS330 (JIS G3101). No boron addition.

Mechanical Properties — ISO Class 4 (ISO 898-2)

* Class 4 offers the highest ductility (min. 22% elongation) of all carbon steel nut classes, ensuring excellent formability and resistance welding consistency. Maximum hardness ≤ 188 HV guarantees no risk of hydrogen embrittlement in plating processes.

Why Choose FULLERKREG DIN 929 Q195 Class 4 Weld Nuts?

• 🏭 Factory Direct — Manufactured in-house with full process control from raw material to finished part
• 💰 Most Cost-Effective Grade — Q195 low carbon steel delivers the lowest material cost in the DIN 929 range without compromising weld quality
• ⚡ Best-in-Class Weldability — Ultra-low carbon content (≤ 0.12%) ensures the most consistent, reliable resistance welding performance with minimal spatter and zero HAZ cracking risk
• 🛡️ Maximum Ductility — ≥22% elongation provides excellent formability and impact resistance for light-duty assemblies
• 📐 Strict DIN 929 Compliance — Every dimension and tolerance verified against the standard; no substitutions
• 🔬 Material Certified — Mill test certificates (MTC) available; Q195 composition verified per GB/T 700
• 🎨 Bare Finish — Post-Process Ready — Uncoated surface is ideal for e-coat, powder coat, paint, or zinc plating applied after welding; ≤188 HV hardness eliminates hydrogen embrittlement risk during acid pickling
• 📦 Bulk Wholesale Supply — MOQ-friendly pricing tiers; consistent lot quality for high-volume 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