Lock Washers: Load Capacity 200-1000 N, Inner Diameter 4-12 mm

Component Specifications

Definition

Lock washers are specialized fastening components used in aluminum profile corner connectors to maintain preload and prevent loosening of bolts or screws due to vibration, thermal cycling, or dynamic loads. They function by applying a continuous spring force against the fastener head/nut and the joint surface, compensating for material relaxation and maintaining clamping force.

Working Principle

Lock washers work on the spring principle - when compressed during fastener tightening, they store elastic energy that creates a continuous axial force. This force maintains tension in the bolt/screw, preventing rotation and loosening. The split or helical design allows the washer to act as a spring, applying constant pressure even as materials settle or expand/contract.

Materials

Typically made from spring steel (AISI 1074/1095), stainless steel (AISI 302/304/316), or phosphor bronze. Surface treatments include zinc plating, galvanization, or dichromate coating for corrosion resistance. Material hardness: HRC 40-50 for steel versions.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thickness	1-3 mm
Load Capacity	200-1000 N
Inner Diameter	4-12 mm
Outer Diameter	8-20 mm
Surface Finish	Zinc plated or passivated
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 10683, DIN 127, ISO 898-1

Parent Products

This component is used in the following industrial products

Aluminum Profile Corner Connector

The Aluminum Profile Corner Connector is a precision-machined aluminum alloy component designed to securely join two aluminum extrusion profiles at 90-degree angles in structural frameworks.

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Engineering Analysis

Risks & Mitigation

Over-torquing can flatten the spring action
Galvanic corrosion with aluminum profiles
Incorrect washer size leading to insufficient locking force
Material fatigue after repeated loading cycles

FMEA Triads

Trigger: Insufficient preload during installation
Failure: Fastener loosening under vibration
Mitigation: Use torque wrenches with calibrated settings, follow manufacturer torque specifications, implement regular inspection schedules

Trigger: Galvanic corrosion between steel washer and aluminum profile
Failure: Corrosion-induced seizure or reduced locking force
Mitigation: Use compatible materials (stainless steel or coated washers), apply anti-seize compounds, implement corrosion protection measures

Trigger: Material fatigue from cyclic loading
Failure: Loss of spring tension over time
Mitigation: Regular replacement schedules, use higher-grade materials for high-cycle applications, implement preventive maintenance programs

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm on diameter dimensions, ±0.05 mm on thickness

Test Method

Vibration testing per ISO 16148, torque retention testing, salt spray testing per ISO 9227 for corrosion resistance

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 Lock Washers

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 Teng Qi Fasteners Co., Ltd

Ningbo, Zhejiang, CN

ISO 9001:2015 IATF 16949

Also makes: Nut, Laser Cutting System, Control System and 1 more

Listed on the company's own website · profile compiled by CNFX from public sources

View profile Send enquiry

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 lock washers and flat washers?

Flat washers distribute load and prevent surface damage, while lock washers actively prevent fastener loosening through spring action. Lock washers are specifically designed for vibration-prone applications.

How do I properly install lock washers in aluminum profile connectors?

Install between the fastener head/nut and the joint surface. Ensure the washer is not over-compressed (should maintain spring action) and use proper torque specifications. Always follow manufacturer recommendations for specific aluminum alloy applications.

Can lock washers be reused?

Generally not recommended. Lock washers lose their spring properties after compression and may not provide adequate locking force upon reinstallation. Always use new washers for critical connections.

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.

Lock Washers