S-90097A161 0.504" ID x 0.645" OD Insulating Washers

Insulating Washers

1281FA00025 Insulating Washers
1281FA00025 Insulating Washers

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

Part No.
Part No. 1281FA00025
Equivalent to mcmaster :
90097A161

Basic Information

System of Measurement Inch
Washer Type Sleeve
Color Off-White

Dimension Parameters

ID 0.504"
OD 0.645"
Overall Height 0.28"

Material & Strength Parameters

Material Nylon Plastic
Hardness Rockwell R118

Temperature & Environment Parameters

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

Installation & Application Parameters

For Screw Size 1/2"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant

Geometric Parameters

Sleeve OD 0.548"
Sleeve Height 0.125"
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 and corrosion resistance from durable nylon plastic construction
  • Reliable performance in extreme environments with a wide operating temperature range from -40°F to 180°F
  • Superior mechanical protection and vibration dampening due to the Rockwell R118 hardness and sleeve design
  • Precise fit for 1/2" screws ensured by the 0.504" inner diameter and 0.548" sleeve OD
  • Easy compliance with global environmental regulations as it is RoHS 3 and REACH compliant
  • Reduced risk of galvanic corrosion when used with metal fasteners, thanks to the non-conductive nylon material
  • Long-lasting service life in demanding applications due to the material's inherent durability and wear resistance

Professional Applications & Engineering Value

This nylon plastic sleeve washer is engineered to solve critical challenges in industrial assembly and maintenance. Its non-conductive properties make it ideal for electrical applications where insulation is paramount, preventing short circuits. The sleeve design provides enhanced bearing surface and protection against vibration loosening, which is a common failure point in machinery and equipment. Manufactured from high-grade nylon, it resists chemicals, oils, and abrasion, ensuring reliable performance in industrial environments from automotive to outdoor enclosures. The ability to maintain integrity across a broad temperature range from -40°F to 180°F means it performs consistently in both freezing cold and moderately high-heat conditions, offering a versatile sealing and spacing solution for 1/2" screw fastening systems.

Specification Summary & Compliance

This washer features precise inch system dimensions: 0.504" ID, 0.645" OD, 0.28" overall height, and a sleeve OD of 0.548". It is manufactured to provide a secure fit for 1/2" screw size applications. The material meets Rockwell R118 hardness for consistent mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated industrial and international markets.

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