INDUSTRY COMPONENT

Locking Nut

A specialized nut designed to secure threaded components against vibration-induced loosening in adjustable leveling foot assemblies.

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Component Specifications

Definition
A locking nut is a precision-engineered fastener used in adjustable leveling foot assemblies to prevent unintended rotation or loosening due to dynamic loads, vibrations, or thermal cycling. It typically features a self-locking mechanism, such as a nylon insert, deformed threads, or a prevailing torque design, that creates friction or mechanical interference to maintain clamping force without requiring secondary locking devices like washers or adhesives.
Working Principle
The locking nut operates on the principle of controlled friction or mechanical deformation. When threaded onto a bolt or stud, its internal features (e.g., nylon ring, elliptical top, or slotted crown) create radial pressure or thread distortion, increasing the torque required for rotation. This resistance prevents back-off under operational stresses, ensuring the leveling foot remains securely positioned to maintain machine alignment and stability.
Materials
Common materials include medium-carbon steel (grade 5 or 8), stainless steel (AISI 304/316), or alloy steel, often with zinc plating, hot-dip galvanizing, or dichromate coatings for corrosion resistance. Nylon inserts are typically polyamide-based.
Technical Parameters
  • Height 8-20 mm
  • Thread Size M8 to M20
  • Locking Type Nylon insert
  • Torque Range 15-120 Nm
  • Temperature Range -40°C to +120°C
Standards
ISO 7042, DIN 985

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Locking Nut.

locking nut leveling foot nut vibration-resistant nut nylon insert nut industrial fasteners machine alignment DIN 985 ISO 7042 Locking Nut in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Adjustable Leveling Foot Assembly

Height-adjustable support component for stabilizing metal furniture on uneven surfaces.

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Engineering Analysis

Risks & Mitigation
  • Over-torquing can strip threads or damage the locking mechanism
  • Incorrect material selection may lead to corrosion in harsh environments
  • Reuse beyond limits reduces locking effectiveness
FMEA Triads
Trigger: Insufficient torque during installation
Failure: Nut loosens, causing machine misalignment and instability
Mitigation: Use calibrated torque wrenches and follow manufacturer specs
Trigger: Exposure to temperatures beyond nylon insert limits
Failure: Insert degrades, losing locking capability
Mitigation: Select all-metal locking nuts for high-temperature applications

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thread tolerance per ISO 965-1 medium class; locking torque meets ISO 2320
Test Method
Vibration testing per DIN 65151, torque-tension testing per ISO 16047

Buyer Feedback

★★★★☆ 4.5 / 5.0 (27 reviews)

"Testing the Locking Nut now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Locking Nut meets all ISO standards."

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Frequently Asked Questions

How does a locking nut differ from a standard nut?

A locking nut incorporates design features like nylon inserts or deformed threads to resist loosening from vibration, while standard nuts rely solely on thread friction and may require lock washers.

Can locking nuts be reused?

Nylon insert locking nuts are generally limited to 5-10 reuses due to insert wear; all-metal prevailing torque nuts may allow more reuses if torque values remain within specifications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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