Side-by-Side Comparison
Nuts & Threaded Inserts
Flange Nuts vs. Threaded Inserts & Heat-Set Bushings
Comparing 2 standards across 11 specifications. 11 key differences identified.
Comparing:
Flange Nuts
Threaded Inserts & Heat-Set Bushings
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.
Threaded inserts (including brass heat-set inserts for 3D-printed thermoplastics and helical wire coils / Helicoils for soft aluminum) provide robust, reusable internal machine screw threads in materials that would otherwise strip under repeated fastener torque.
Specification Comparison Table
11 Parameters| Parameter / Spec | ||
|---|---|---|
|
Primary Applications
|
Automotive exhaust and chassis, bicycle axle nuts, solar panel racking, sheet metal framing | 3D printer enclosures, drone frames, automotive engine block head-bolt thread repairs, electronics housings |
|
Standard Specifications
|
DIN 6923 / ISO 4161 / ASME B18.16.4 | — |
|
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) | — |
|
Insert Technologies
|
— | Brass tapered heat-set inserts, Helical wire coils (DIN 8140), Self-tapping wood inserts |
|
Heat-Set Installation
|
— | Heated with soldering iron tip at 200°C–250°C into pre-molded/printed pilot holes |
|
Retention Features
|
— | Opposing diagonal diamond knurling rings and undercuts that capture melted plastic |
|
Helicoil Material
|
— | Diamond-profile 304 stainless steel spring wire (1.0D, 1.5D, 2.0D thread engagement length) |
|
Pull-Out Strength
|
— | Up to 5× to 10× higher tensile pullout resistance than threads cut directly into polymer or wood |