Nyloc Nuts vs. Wing Nuts
Comparing 2 standards across 10 specifications. 10 key differences identified.
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.
The Wing Nut (Butterfly Nut, standardized under DIN 315 and ASME B18.6.9) features two large ergonomic metallic side projections ("wings") extending vertically from the central threaded boss. Designed for rapid, tool-free tightening and loosening by hand, it is the standard fastener on stage lighting C-clamps, drum set cymbal stands, and battery terminals.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standard Specifications
|
ISO 7040 (Standard height) / ISO 10511 (Low profile) / DIN 985 / ASME B18.16.6 | DIN 315 (Type D ductile cast / Type F forged) / ASME B18.6.9 (Type A/B/C) |
|
Primary Applications
|
Automotive suspension, aircraft, lawnmowers, go-karts, robotic actuators | Drum kits (cymbal stands), stage theatrical lighting clamps, air filter covers, marine battery terminals |
|
Locking Mechanism
|
Radial elastic compression of unthreaded polyamide nylon collar | — |
|
Operating Temperature Range
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-50°C to +120°C (-58°F to +248°F) | — |
|
Prevailing Torque Behavior
|
Maintains locking friction even without axial bolt preload (free-spinning torque) | — |
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Reusability Guidelines
|
Reusable 2 to 3 times before nylon wear reduces prevailing torque below safety limits | — |
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Wing Geometry
|
— | Two opposing curved radial wings for manual two-finger leverage |
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Tightening Method
|
— | 100% Tool-free manual finger tightening |
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Common Materials
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— | Stainless steel (A2/A4), zinc-plated malleable iron, brass, nylon plastic |
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Clamping Torque Limitation
|
— | Low manual torque (~1.5 to 5 N·m depending on finger grip strength) |