Side-by-Side Comparison
Nuts & Threaded Inserts
Flange Nuts vs. Hex Nuts
Comparing 2 standards across 11 specifications. 11 key differences identified.
Comparing:
Flange Nuts
Hex Nuts
The Flange Nut (standardized under DIN 6923 and ISO 4161) is a hexagonal nut featuring an integrated wide, circular washer-like flange base. Available in smooth and serrated locking variants, it distributes clamping pressure over a larger surface area and eliminates the need for separate flat washers in high-speed automotive and industrial assembly.
The Standard Hex Nut (standardized under ISO 4032, DIN 934, and ASME B18.2.2) is a 6-sided internal-threaded mechanical fastener. Paired with mating machine screws and structural bolts, it converts rotational tightening torque into axial clamping preload across industrial and architectural assemblies.
Specification Comparison Table
11 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standard Specifications
|
DIN 6923 / ISO 4161 / ASME B18.16.4 | ISO 4032 (Standard style 1) / DIN 934 / ASME B18.2.2 |
|
Flange Diameter Ratio
|
Flange Base Diameter ≈ 2.0× to 2.2× Thread Diameter | — |
|
Bearing Surface Variants
|
Smooth Flange (load spreading) or Serrated Flange (mechanical anti-backoff teeth) | — |
|
Serration Angle
|
Angled teeth that allow clockwise tightening but bite into metal during counter-clockwise loosening | — |
|
Property Classes
|
Class 8, Class 10 (ISO 898-2) / Grade 5, Grade 8 (Imperial) | — |
|
Primary Applications
|
Automotive exhaust and chassis, bicycle axle nuts, solar panel racking, sheet metal framing | — |
|
Geometry
|
— | 6-sided regular hexagonal prism with internal tapped thread and double chamfered faces |
|
Nominal Height Ratio
|
— | Height ≈ 0.8× Nominal Diameter (m ≈ 0.8D) |
|
Metric Property Classes
|
— | Class 6, Class 8 (for 8.8 bolts), Class 10 (for 10.9 bolts), Class 12 (for 12.9 bolts) |
|
Imperial Strength Grades
|
— | Grade 2 (plain), Grade 5 (dot markings), Grade 8 (corner dots/notches) |
|
Jam Nut Variant
|
— | ISO 4035 / DIN 439 (Thin half-height hex nut used for locking) |