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  • M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer
  • M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer
  • M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer
  • M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer
  • M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer
  • M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer
M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer
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M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer

  • >= 1000 Pieces
    $0.03

Customization:

Customized logo（Min.Order: 1000000 pieces）
Customized packaging（Min.Order: 1000000 pieces）
Graphic customization（Min.Order: 1000000 pieces）
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M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Insulation & Force Distribution: Made from Bakelite and epoxy resin, these washers provide electrical insulation while evenly distributing pressure from screws/bolts (M3, M4, M18, M14) to protect surfaces.
  • Corrosion Resistance: Zinc-plated finish and galvanized treatment ensure durability in humid or corrosive environments, extending service life.

Key features

  • 1. Material Technology

    • With a bakelite and epoxy resin composition, ensure superior electrical insulation and corrosion resistance compared to standard metal washers*. The zinc-plated surface further enhances durability in harsh environments.

  • 2. Interactive Design

    • With multi-thread compatibility (M3/M4/M14/M18), adapt to diverse fastening needs across hardware and electrical projects*. The flat design provides consistent load distribution for secure fastening.

  • 3. Performance Parameters

    • Compliance with JIS/ANSI/BS/ISO standards ensures reliable performance under varying operational loads and temperatures*. The uniform thickness and precision-machined holes guarantee precise alignment.

  • 4. Scenario Solutions

    • Designed for electrical insulation and vibration damping, ideal for both home appliances and industrial machinery applications*. The non-conductive material prevents short circuits while protecting surfaces from wear.

  • 5. Certification Standards

    • Certified to JIS/ANSI/BS/ISO standards, meeting global quality and safety requirements for professional use*. These certifications ensure compliance with industry regulations for electrical and mechanical systems.

Product details

M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer

The M3 M4 Bakelite Flat Washers Epoxy Resin Insulation Gasket Washer combines robust insulation properties with precise engineering. Crafted from high-density Bakelite reinforced with epoxy resin, these washers ensure electrical safety and mechanical stability in demanding environments. Available in zinc-plated, black, and plain finishes, they comply with global standards (JIS, ANSI, BS, ISO) for universal applicability.

Technical specifications

FeatureSpecificationBenefit
MaterialBakelite + Epoxy Resin CoatingEnhanced insulation, thermal resistance, and durability
Finish OptionsZinc Plated, Black, PlainCorrosion resistance, aesthetic versatility
Thread SizesM3, M4, M14, M18Compatibility with standard bolt dimensions
StandardsJIS, ANSI, BS, ISOGlobal compliance for industrial use
Surface TreatmentZinc Plated (anti-corrosion) / PlainCustomizable protection levels

Customization guide

Adjust material composition (e.g., silicone or nitrile blends) for chemical resistance or extreme temperatures. Modify thickness/diameter to optimize load distribution or fit specific hardware.

Get inspired

With epoxy resin insulation, you can safely secure electrical components in high-voltage systems. The zinc-plated finish ensures longevity in marine or industrial environments, while the M3/M4 sizes cater to compact machinery assembly.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Insulation Resistance5 kV/mm+15% (5.75 kV/mm)+30% (6.5 kV/mm)*
Temperature Rating105°C115°C125°C
Thickness OptionsStandard (1.5–2mm)Adjustable ±10%Custom ±20%

Supplier's note

  1. Breakthrough Features:

    • Epoxy Resin Coating: Achieves 30% higher insulation than uncoated Bakelite, safeguarding against electrical arcing.
    • Zinc Plating: Reduces corrosion rates by 40% compared to plain steel washers.
    • Multi-Standard Compliance: Streamlines global supply chains by meeting JIS, ANSI, and ISO benchmarks.

  2. Version Selection Guide:

    • Base Model: Ideal for general mechanical assembly (e.g., household appliances) where cost efficiency is prioritized.
    • Advanced Model: Suited for automotive or HVAC systems requiring adjustable thickness for vibration damping.
    • Pro Model: Essential for high-voltage electrical equipment (e.g., transformers) needing extreme thermal and insulation performance.

Pro Model’s 6.5 kV/mm insulation exceeds industry standards by 20%, enabling safe use in 10kV systems. Pair with galvanized bolts for corrosion-free outdoor installations.

Frequently asked questions

  • Which M3 or M4 washer size is best for electrical insulation in small appliances?

  • How do I clean and store zinc-plated flat washers to prevent corrosion?

  • Bakelite vs Rubber Washers: Which offers better electrical insulation?

  • Can these epoxy resin washers be customized for non-standard thread sizes like M14 or M18?

  • Are these washers ISO/ANSI certified for industrial use?

  • What's the advantage of zinc-plated over plain surface treatment for outdoor applications?

  • How do bakelite flat washers prevent loosening under vibration compared to standard metal washers?

  • Are these washers suitable for high-temperature environments up to 150°C?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Insulated Flat WashersElectrical panels, PCB mountingDielectric strength: 15 kV/mm (Advanced ▲▲) vs 12 kV/mm (Base ▲) vs Industry 10 kV/mm (IEC 60664-1)Prevents arcing in high-voltage systemsNot suitable for high-temperature use
Corrosion-Resistant WashersCoastal installations, chemical plantsZinc-plated surface (Advanced ▲▲ ASTM B695) with 1000+ hr salt spray resistance vs Base (plain ▲ ASTM B137)Resists saltwater and chemical corrosionCoating may degrade over time
High-Temperature WashersEngine compartments, HVAC systemsBakelite withstands 120°C (Advanced ▲▲ UL 746B) vs Base 100°C vs Industry 100°CMaintains integrity at elevated tempsLess durable under extreme mechanical stress
Thread-Specific Washers (M3/M4)Precision equipment, roboticsThread sizes M3/M4 (ISO 273) with tolerance class 6g ▲▲Ensures tight, vibration-resistant fitsLimited to specific bolt sizes
Customizable Insulation WashersCustom electronics, aerospaceCustom thickness (0.5-3mm ▲) and material (Epoxy Resin ▲)Tailored insulation and mechanical propertiesHigher cost for bespoke solutions
Standard Flat WashersGeneral construction, machineryPlain surface (Base ▲) with 2mm thickness (ISO 746B)Economical and widely applicableMinimal corrosion protection without coating

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