Side-by-Side Comparison
Nuts & Threaded Inserts
Hex Nuts vs. Threaded Inserts & Heat-Set Bushings
Comparing 2 standards across 12 specifications. 12 key differences identified.
Comparing:
Hex Nuts
Threaded Inserts & Heat-Set Bushings
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.
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
12 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standard Specifications
|
ISO 4032 (Standard style 1) / DIN 934 / ASME B18.2.2 | — |
|
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) | — |
|
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 |
|
Primary Applications
|
— | 3D printer enclosures, drone frames, automotive engine block head-bolt thread repairs, electronics housings |