INDUSTRY COMPONENT

Locking Nuts

Locking nuts are specialized fasteners designed to prevent loosening under vibration or dynamic loads in machinery.

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Component Specifications

Definition
Locking nuts are precision-engineered fasteners that incorporate features such as nylon inserts, deformed threads, or prevailing torque designs to maintain clamping force and resist self-loosening in mechanical assemblies. They are critical components in locking devices where secure fastening is essential for safety and operational reliability.
Working Principle
Locking nuts work by creating a mechanical interference or friction that resists rotational forces. Common mechanisms include: nylon inserts that deform against threads, all-metal designs with distorted threads that increase thread engagement friction, and two-piece nuts with integrated locking elements that apply counter-torque.
Materials
Typically manufactured from carbon steel (grade 5, 8), alloy steel, stainless steel (304, 316), or brass. Nylon inserts are made from polyamide (PA66). Surface treatments include zinc plating, hot-dip galvanizing, or dichromate coating for corrosion resistance.
Technical Parameters
  • Height 8-40 mm
  • Proof Load 580-1040 MPa
  • Thread Size M6 to M48
  • Torque Range 10-500 Nm
  • Temperature Range -40°C to +120°C (with nylon insert)
Standards
ISO 7042, ISO 10511, DIN 985, DIN 6927

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Locking Nuts.

locking nuts prevailing torque nuts nylon insert lock nuts all-metal lock nuts vibration-resistant fasteners DIN 985 ISO 7042 Locking Nuts in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Locking Device

A mechanical component within an end bearing assembly that secures bearing elements in position to prevent axial movement or rotation.

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Engineering Analysis

Risks & Mitigation
  • Over-torquing can damage locking mechanisms
  • Incorrect installation direction reduces effectiveness
  • Temperature extremes degrade nylon inserts
  • Corrosion in harsh environments
FMEA Triads
Trigger: Vibration from machinery operation
Failure: Nut loosens, leading to joint failure
Mitigation: Use appropriate locking nut type with proper installation torque
Trigger: Material fatigue from cyclic loading
Failure: Crack propagation in nut body
Mitigation: Select nuts with adequate strength grade and conduct regular inspections

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Thread tolerance: 6g per ISO 965-1
Test Method
Vibration testing per DIN 65151, torque-tension testing per ISO 16047

Buyer Feedback

★★★★☆ 4.9 / 5.0 (18 reviews)

"The technical documentation for this Locking Nuts is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Locking Nuts so far."

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

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Frequently Asked Questions

What is the difference between nylon insert and all-metal locking nuts?

Nylon insert nuts use a polymer ring that deforms against threads for locking, suitable for moderate temperatures. All-metal nuts have distorted threads or integrated locking features, offering higher temperature resistance and reusability.

How many times can locking nuts be reused?

Nylon insert nuts are typically limited to 5-10 reuses before the insert wears out. All-metal locking nuts can often be reused more times if torque values are maintained, but manufacturer specifications should always be followed.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Locking Nut or Clamp Locking Pawl