3.1mm ID x 8.9mm OD Nylon Insulating Bush | Ø15mm Flange

Our 3.1mm ID x 8.9mm OD Nylon Insulating Bush is a precision-engineered insulation component designed to prevent electrical conductivity, heat transfer, and unwanted contact between metal fasteners and sensitive components.  Just one of many components from our comprehensive spacers and washers range, designed to insulate, isolate and reduce friction between moving elements.

Also known as a shoulder washer, screw insulator, insulation ring, top hat bush, or nylon insulating washer, this component is manufactured from high-quality natural Polyamide (Nylon 6), offering excellent mechanical strength, durability, and resistance to vibration.

The integrated 15mm diameter flange (top hat design) provides additional insulation coverage and helps protect surrounding components from contact with the fixing screw or fastener. Ideal for applications requiring reliable electrical isolation, this nylon bush is commonly used within electronics, electrical assemblies, PCB mounting, wiring systems, automotive components, control panels, and industrial equipment.

Technical Specifications

• Material: Natural Polyamide (Nylon 6)
• Internal Diameter (ID): 3.1mm
• Outside Diameter (OD): 8.9mm
• Flange Diameter: 15mm
• Overall Height: 3.5mm
• Flange Thickness: 1.5mm
• Material Colour: Natural Nylon
• Electrical Properties: Non-conductive / Electrical insulating
• Thermal Properties: High thermostability
• Resistance Properties: Vibration resistant, wear resistant
• Manufacturing Material: Nylon Plastic
• Alternative Names: Shoulder Washer, Screw Insulator, Insulation Ring, Top Hat Bush

Material Information

Manufactured from Polyamide Nylon 6, this insulating bush combines excellent mechanical strength with reliable electrical insulation properties.

Nylon 6 is widely used in engineering applications because it offers:

• Good impact resistance
• Low friction characteristics
• Strong dimensional stability
• Resistance to wear and abrasion
• Ability to withstand repeated movement and vibration
• Reliable performance across a wide temperature range

This makes the bush suitable for demanding environments where standard plastic washers may not provide sufficient durability.

Colour Options

Standard colours and finishes are available where possible. If you require a colour variation not shown within the available options, please contact our sales team. We may be able to provide alternative colours or custom solutions depending on quantity requirements.

Product Applications

This nylon insulating bush is suitable for use in:

• Electrical insulation assemblies
• PCB mounting applications
• Circuit board protection
• Cable and wiring installations
• Transformer and power equipment
• Automotive electrical systems
• Control panels and switchgear
• Electronic device manufacturing
• Mechanical assemblies requiring isolation
• Screw and fastener insulation

Key Benefits of Nylon Insulating Bushes

• Electrical insulation: Non-conductive Nylon 6 material helps prevent current transfer between components.
• Heat resistant: Excellent thermal stability for applications exposed to elevated temperatures.
• High vibration resistance: Durable construction helps maintain performance in moving or high-vibration environments.
• Lightweight and strong: Nylon provides excellent strength-to-weight performance.
• Protects components: Prevents metal screws and fasteners from damaging sensitive surfaces.
• Corrosion resistant: Unlike metal alternatives, nylon will not rust or corrode.
• Versatile applications: Suitable for electrical, mechanical, and industrial assemblies.

Why Choose Our Nylon Insulating Bushes?

We supply high-quality insulation components manufactured for dependable performance across electrical, mechanical, and industrial applications. If you require a single insulating bush for repair work or larger quantities for production, our team can help you select the correct size, material, and specification for your application.

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• Material Data Sheet