S-90097A175 0.879" ID x 1.03" OD Insulating Washers

Insulating Washers

1281FA00039 Insulating Washers
1281FA00039 Insulating Washers

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

Part No.
Part No. 1281FA00039
Equivalent to mcmaster :
90097A175

Basic Information

System of Measurement Inch
Washer Type Sleeve
Color Off-White

Dimension Parameters

ID 0.879"
OD 1.03"
Overall Height 0.43"

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 7/8"

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 0.954"
Sleeve Height 0.25"
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Exceptional temperature resistance maintains structural integrity from -40°F to 180°F, ensuring reliable performance in extreme environments
  • Rockwell R118 hardness rating provides superior durability and wear resistance for long-lasting industrial applications
  • Nylon plastic construction offers excellent chemical resistance and corrosion protection in demanding conditions
  • Precision sleeve design with 0.954" OD and 0.25" height ensures optimal load distribution and vibration dampening
  • RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global industrial use
  • Off-white color and smooth surface allows for easy visual inspection and clean installation in precision assemblies
  • Optimized dimensions (0.879" ID, 1.03" OD) provide perfect fit for 7/8" fasteners while preventing material deformation

Professional Applications & Engineering Value

This nylon sleeve washer delivers critical engineering solutions where metal washers fail. The nylon plastic material eliminates galvanic corrosion risks when used with dissimilar metals while providing excellent electrical insulation properties. Its sleeve-type design with 0.25" sleeve height distributes clamping forces evenly, preventing surface damage and maintaining joint integrity in heavy-duty industrial applications. The temperature-resistant properties (-40°F to 180°F) make it ideal for outdoor equipment, automotive assemblies, and machinery exposed to thermal cycling. The combination of Rockwell R118 hardness and chemical resistance ensures reliable performance in environments with exposure to oils, solvents, and moisture, reducing maintenance frequency and replacement costs.

Specification Summary & Compliance

This inch system sleeve washer features precise dimensional specifications including 0.879" ID, 1.03" OD, 0.954" sleeve OD, and 0.43" overall height, engineered for 7/8" screw applications. Manufactured to exacting standards with Rockwell R118 hardness for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and chemical restriction adherence. The temperature range specification of -40°F to 180°F is validated for maintained mechanical properties and dimensional stability throughout the operating range.

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