S-91145A256 0.257" ID x 0.505" OD Insulating Washers

Insulating Washers

1280FA00078 Insulating Washers
1280FA00078 Insulating Washers

Image may differ from product. See technical specification for details.

Part No.
Part No. 1280FA00078
Equivalent to mcmaster :
91145A256

Basic Information

System of Measurement Inch
Washer Type Sleeve
Color Off-White

Dimension Parameters

ID 0.257"
OD 0.505"
Thickness 0.062"
Overall Height 0.155"

Material & Strength Parameters

Material Nylon 6/6 Plastic
Hardness Rockwell R108

Temperature & Environment Parameters

Temperature Range, °F Min. -40°
Temperature Range, °F Maximum 180°

Installation & Application Parameters

For Screw Size 1/4"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2022, 223 SVHC) Compliant

Geometric Parameters

Sleeve OD 0.343"
Sleeve Height 0.093"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Excellent electrical insulation properties for safe use in electrical assemblies and sensitive equipment
  • Superior corrosion and chemical resistance for long-lasting performance in harsh industrial environments
  • High Rockwell R108 hardness provides exceptional durability and resistance to deformation under load
  • Wide operating temperature range from -40°F to 180°F ensures reliable performance in both extreme cold and heat
  • Sleeve design enhances stability and alignment for 1/4" screws, preventing loosening and improving assembly integrity
  • Lightweight and non-magnetic Nylon 6/6 construction reduces overall weight and eliminates interference in electronic applications
  • Compliance with RoHS 3 and REACH regulations guarantees safety and environmental responsibility for global supply chains

Professional Applications & Engineering Value

This Nylon 6/6 Plastic Sleeve Washer is engineered to solve critical challenges in industrial assembly. Its sleeve design provides superior alignment and vibration resistance for 1/4" screws, making it ideal for applications in electrical enclosures, automotive components, and machinery where loosening can lead to failure. The off-white Nylon 6/6 material offers excellent electrical insulation and resistance to corrosion, oils, and many chemicals, eliminating the risk of galvanic corrosion when used with dissimilar metals. Its ability to withstand a temperature range from -40°F to 180°F ensures dependable performance in both freezing outdoor and heated indoor environments, providing a reliable, maintenance-free solution that enhances the longevity and safety of your assemblies.

Specification Summary & Compliance

This precision washer features an ID of 0.257", OD of 0.505", and a thickness of 0.062", with a sleeve OD of 0.343" and sleeve height of 0.093" for optimal fit with 1/4" screws. Manufactured from high-grade Nylon 6/6 plastic with a Rockwell R108 hardness, it ensures consistent dimensional stability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.

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