S-91145A157 0.2" ID x 0.399" OD Insulating Washers

Insulating Washers

1280FA00028 Insulating Washers
1280FA00028 Insulating Washers

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

Part No.
Part No. 1280FA00028
Equivalent to mcmaster :
91145A157

Basic Information

System of Measurement Inch
Washer Type Sleeve
Color Off-White

Dimension Parameters

ID 0.2"
OD 0.399"
Thickness 0.063"
Overall Height 0.438"

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 No. 10

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant

Geometric Parameters

Sleeve OD 0.26"
Sleeve Height 0.375"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior electrical insulation provided by Nylon 6/6 material, preventing current leakage and short circuits in sensitive assemblies
  • Excellent vibration resistance due to the sleeve design and plastic composition, maintaining bolt tension and reducing maintenance needs
  • Wide temperature tolerance from -40°F to 180°F, ensuring reliable performance in diverse industrial environments
  • Durable mechanical properties with Rockwell R108 hardness, resisting wear and deformation under load
  • Precise dimensional fit with 0.2" ID and 0.26" sleeve OD, ensuring easy installation and alignment with No. 10 screws
  • Environmental compliance with RoHS 3 standards, making it safe for use in regulated industries
  • Corrosion-free operation as a non-metallic washer, ideal for humid or chemically exposed applications

Professional Applications & Engineering Value

This Nylon 6/6 Plastic Sleeve Washer is engineered to address common challenges in electrical and mechanical assemblies where metal components fail. Its sleeve-type construction provides enhanced load distribution and prevents loosening from vibrations, a critical issue in machinery and automotive systems. The off-white nylon material offers inherent electrical insulation, eliminating the risk of galvanic corrosion and short circuits in control panels, enclosures, or PCB mountings. With a temperature range of -40°F to 180°F, it maintains integrity in outdoor equipment or HVAC systems, while the Rockwell R108 hardness ensures long-term durability without cracking. Ideal for No. 10 screw applications in inch-based designs, this washer simplifies inventory management and reduces downtime in maintenance-heavy industries.

Specification Summary & Compliance

This washer features precise dimensions including 0.2" ID, 0.399" OD, 0.063" thickness, and 0.26" sleeve OD, manufactured to standard inch system tolerances for consistent fit. It complies with RoHS 3 (2015/863/EU) regulations, ensuring it is free from hazardous substances, and is suitable for applications requiring non-conductive, corrosion-resistant components. The material, Nylon 6/6, meets industry standards for plastic fasteners in mechanical and electrical assemblies.

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