S-91145A252 0.255" ID x 0.563" OD Insulating Washers

Insulating Washers

1280FA00074 Insulating Washers
1280FA00074 Insulating Washers

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

Part No.
Part No. 1280FA00074
Equivalent to mcmaster :
91145A252

Basic Information

System of Measurement Inch
Washer Type Sleeve
Color Off-White

Dimension Parameters

ID 0.255"
OD 0.563"
Thickness 0.062"
Overall Height 0.499"

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 0.375"
Sleeve Height 0.437"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Superior corrosion resistance thanks to Nylon 6/6 material, eliminating rust and ensuring long-term reliability in harsh environments.
  • Excellent electrical insulation properties for safe use in electrical assemblies, preventing short circuits and enhancing operational safety.
  • Wide temperature tolerance from -40°F to 180°F, maintaining structural integrity and performance in both extreme cold and moderate heat.
  • High durability with Rockwell R108 hardness, providing consistent load distribution and resistance to wear under vibration and pressure.
  • Precise dimensional fit with 0.255" ID and 0.563" OD, ensuring easy installation and secure fastening for 1/4" screws.
  • Full compliance with RoHS 3 and REACH standards, guaranteeing environmental safety and meeting global regulatory requirements for industrial use.
  • Lightweight and non-conductive design, reducing overall assembly weight and minimizing risks in sensitive applications.

Professional Applications & Engineering Value

This Nylon 6/6 sleeve washer is engineered to address common industrial challenges like corrosion, electrical hazards, and component degradation. Its off-white nylon construction offers inherent resistance to moisture, chemicals, and UV exposure, making it ideal for electrical insulation in control panels, machinery, and outdoor equipment. The sleeve design enhances stability by providing a snug fit around 1/4" screws, reducing loosening from vibrations in automotive, aerospace, and manufacturing setups. With a temperature range of -40°F to 180°F, it performs reliably in fluctuating conditions, while its Rockwell R108 hardness ensures it withstands repetitive stress without cracking, extending service life and minimizing maintenance costs.

Specification Summary & Compliance

This washer features precise inch-system dimensions: ID 0.255", OD 0.563", thickness 0.062", and sleeve OD 0.375" for accurate fitment. It adheres to standard industrial tolerances and is manufactured from Nylon 6/6 plastic for consistent performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards, ensuring suitability for global supply chains.

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