Locking Nuts: Torque Range 10-500 Nm, Thread Size M6 to M48

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

Parameter	Typical range	Notes & selection driver
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)

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, ISO 10511, DIN 985, DIN 6927

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

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Thread tolerance: 6g per ISO 965-1

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 Nuts

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

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

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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.

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.

Locking Nuts