INDUSTRY COMPONENT

Spring Washer

Spring washer is a mechanical fastener designed to prevent loosening of bolted joints through spring tension and friction.

Component Specifications

Definition
A spring washer, specifically a disc spring or Belleville washer, is a conical-shaped washer that applies a continuous spring force against a nut or bolt head. When compressed during tightening, it creates axial tension that counteracts vibrational loosening in mechanical assemblies. In coupling mechanisms, it maintains preload on connecting elements, ensuring torque transmission reliability.
Working Principle
Works on the spring principle: when compressed between mating surfaces during bolt tightening, the washer's conical shape deflects elastically, storing mechanical energy as spring force. This force maintains constant pressure on the threaded connection, increasing friction at the thread interface and preventing rotation-induced loosening under dynamic loads.
Materials
Typically made from spring steel (SAE 1070-1095, AISI 1050-1095), stainless steel (AISI 302/304/316), or alloy steel. May feature zinc plating, phosphate coating, or dichromate treatment for corrosion resistance. Material hardness: HRC 40-50 for standard applications.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Thickness1-5 mm
Load Capacity200-5000 N
Inner Diameter4-25 mm
Outer Diameter8-50 mm
Operating Temperature-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 6796, ASME B18.21.1

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Fatigue failure from cyclic loading
  • Corrosion in harsh environments
  • Incorrect installation reducing effectiveness
  • Material embrittlement at extreme temperatures
FMEA Triads
Trigger: Over-tightening beyond elastic limit
Failure: Plastic deformation, loss of spring force
Mitigation: Use torque wrenches with specified values; replace if flattened
Trigger: Exposure to corrosive chemicals
Failure: Material degradation, fracture
Mitigation: Select corrosion-resistant materials; apply protective coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.1 mm on dimensions per ISO 2768-m
Test Method
Compression testing per ISO 10683; salt spray testing per ASTM B117 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 Spring Washer

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

Haiyan Bolt Co., Ltd.
Jiaxing, Zhejiang, CN
Also makes: Nut, Self-Tapping Screw, Furniture Hinge and 9 more
Listed on the company's own website · profile compiled by CNFX from public sources
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
Ningbo Bysen Machinery Co.,Ltd.
Ningbo, Zhejiang, CN
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 spring washer prevent loosening?

It creates continuous spring pressure that increases friction between threads, resisting rotational forces from vibration or thermal cycling.

Can spring washers be reused?

Not recommended, as repeated compression cycles can cause spring fatigue and loss of tension, compromising locking effectiveness.

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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