Washer/Spacer: Inner Diameter 2.5-50 mm, Thickness 0.5-10 mm

Component Specifications

Definition

A washer/spacer is a mechanical component typically placed under a nut, bolt head, or between two surfaces in a fastener assembly. It serves multiple functions including load distribution to prevent surface damage, vibration damping to maintain bolt tension, corrosion prevention through isolation, and precise spacing to ensure proper alignment and clearance in mechanical systems. In industrial applications, washers/spacers are critical for maintaining structural integrity, reducing wear, and ensuring reliable operation of machinery.

Working Principle

Washers/spacers work by creating a larger bearing surface area to distribute compressive forces from fasteners, reducing stress concentration on connected materials. They absorb vibrations and thermal expansions to prevent fastener loosening, maintain consistent clamping force, and provide precise dimensional spacing to ensure proper alignment and functionality of assembled components.

Materials

Common materials include carbon steel (AISI 1010-1020), stainless steel (AISI 304, 316), aluminum alloys (6061-T6), brass, bronze, plastic (nylon, PTFE), and rubber. Material selection depends on application requirements including corrosion resistance, electrical insulation, temperature tolerance, and load capacity.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	HRB 70-100 (steel)
Thickness	0.5-10 mm
Load Capacity	Varies by material and design
Inner Diameter	2.5-50 mm
Outer Diameter	5-100 mm
Surface Finish	Plain, zinc-plated, galvanized, passivated

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 7089, ISO 7090, ISO 7091, DIN 125, DIN 126, DIN 127, ANSI B18.22.1

Parent Products

This component is used in the following industrial products

Fastener System

A mechanical assembly designed to securely join and fasten panels together within a larger panel joint system.

View Product Details

Engineering Analysis

Risks & Mitigation

Incorrect material selection leading to corrosion
Improper sizing causing fastener failure
Inadequate load distribution damaging surfaces
Vibration-induced loosening
Thermal expansion mismatch

FMEA Triads

Trigger: Material fatigue under cyclic loading
Failure: Cracking or deformation
Mitigation: Use materials with appropriate fatigue strength, implement regular inspection protocols

Trigger: Corrosion in harsh environments
Failure: Reduced thickness and load capacity
Mitigation: Select corrosion-resistant materials, apply protective coatings, use isolation washers

Trigger: Incorrect installation torque
Failure: Improper clamping force distribution
Mitigation: Follow torque specifications, use calibrated tools, implement quality control checks

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.1 mm on critical dimensions per ISO 2768-m

Test Method

Dimensional verification per ISO 9001, load testing per ASTM F436, corrosion resistance per ASTM B117

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 Washer/Spacer

Manufacturer profiles associated with Washer/Spacer.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a washer and a spacer?

Washers primarily distribute load and prevent surface damage, while spacers are specifically designed to maintain precise distances between components. Some products combine both functions.

How do I select the right washer/spacer material?

Consider application environment (corrosion, temperature), load requirements, electrical properties, and compatibility with connected materials. Consult engineering specifications and material data sheets.

What are the consequences of using incorrect washers/spacers?

Incorrect selection can lead to fastener loosening, material deformation, corrosion, electrical issues, premature failure, and compromised machine safety and performance.

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.

Washer/Spacer