1. Standards & Specifications
Standard: German Industrial Standard (DIN 934), compatible with ISO 4032 (metric hex nuts).
Thread: Metric coarse thread (M-series, e.g., M6, M12), 60° thread angle.
Dimensions:
Height: ~0.8× nominal diameter (e.g., M10 nut height ≈ 8mm).
Wrench size: DIN-specified across-flats (e.g., M12 nut uses 19mm wrench).

2. Material & Strength Grades
Materials:
Carbon steel (zinc-plated, phosphated, or Dacromet-coated).
Stainless steel (A2-70, A4-80 for corrosion resistance).
Alloy steel (high-strength applications).
Strength Grades:
Class 4 (low), 5, 8 (common, 800 MPa tensile strength), 10 (high).
Stainless steel grades: A2-70 (700 MPa), A4-80 (800 MPa).

3. Applications
Machinery: General-purpose fastening in equipment assembly.
Automotive: Engine, transmission, and chassis components.
Construction: Steel structures, brackets (paired with high-strength bolts).
Consumer Electronics: Standardized metric fastening solutions.

4. Key Features
Full-height design: Robust load distribution compared to thin nuts (e.g., DIN 439).
Interchangeability: Matches metric bolts (e.g., ISO 4014/4017 bolts).
Corrosion options: Stainless steel or coatings for harsh environments.

5. Comparison with Other Standards
vs. ANSI: Metric (mm) vs. imperial (inch); M-thread vs. UNC/UNF.
vs. GB 6170: Nearly identical to Chinese GB standard, minor tolerance differences.

Note:
Pair with matching bolt grades (e.g., Class 8 nut for 8.8-grade bolt).
Apply proper torque to avoid thread stripping.
Use stainless steel (A4-80) in corrosive or outdoor environments.

Summary: DIN 934 hex nuts, with standardized metric sizing and versatile strength grades, are widely used in European engineering and global industries for reliable, medium-load fastening.