INDUSTRY COMPONENT

Locking Nut

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

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
ParameterTypical rangeNotes & selection driver
Height8-20 mm
Thread SizeM8 to M20
Locking TypeNylon insert
Torque Range15-120 Nm
Temperature Range-40°C to +120°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 7042, DIN 985

Parent Products

This component is used in the following industrial products

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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Locking Nut

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Ningbo Fastenwell
Ningbo, Zhejiang, CN
Founded 200610 staff1000 m²
CE 15048 CE 14399 ISO9001:2018
Also makes: Nut, Self-Tapping Screw, Heat Exchanger and 9 more
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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