Side-by-Side Comparison
Nuts & Threaded Inserts
Nyloc Nuts vs. Threaded Inserts & Heat-Set Bushings
Comparing 2 standards across 11 specifications. 11 key differences identified.
Comparing:
Nyloc Nuts
Threaded Inserts & Heat-Set Bushings
The Nyloc Nut (Nylon-Insert Lock Nut / Prevailing Torque Nut, standardized under ISO 7040 and DIN 985) incorporates a non-threaded polymer nylon ring permanently captured in an upper crown collar. When threaded onto a bolt, the nylon insert deforms elastically around the bolt threads, generating high frictional prevailing torque that prevents vibrational back-off.
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 suspension, aircraft, lawnmowers, go-karts, robotic actuators | 3D printer enclosures, drone frames, automotive engine block head-bolt thread repairs, electronics housings |
|
Standard Specifications
|
ISO 7040 (Standard height) / ISO 10511 (Low profile) / DIN 985 / ASME B18.16.6 | — |
|
Locking Mechanism
|
Radial elastic compression of unthreaded polyamide nylon collar | — |
|
Operating Temperature Range
|
-50°C to +120°C (-58°F to +248°F) | — |
|
Prevailing Torque Behavior
|
Maintains locking friction even without axial bolt preload (free-spinning torque) | — |
|
Reusability Guidelines
|
Reusable 2 to 3 times before nylon wear reduces prevailing torque below safety limits | — |
|
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 |