S-91145A228 0.125" ID x 0.312" OD Insulating Washers

Insulating Washers

1280FA00053 Insulating Washers
1280FA00053 Insulating Washers

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

Part No.
Part No. 1280FA00053
Equivalent to mcmaster :
91145A228

Basic Information

System of Measurement Inch
Washer Type Sleeve
Color Off-White

Dimension Parameters

ID 0.125"
OD 0.312"
Thickness 0.058"
Overall Height 0.37"

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. 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 0.185"
Sleeve Height 0.312"
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 properties from Nylon 6/6 material, preventing current leakage in sensitive electronic assemblies
  • Excellent corrosion and chemical resistance for long-lasting performance in harsh industrial environments
  • Wide temperature tolerance maintains structural integrity from -40°F to 180°F for diverse application settings
  • Precise dimensional fit with 0.125" ID specifically engineered for No. 4 screws, ensuring secure fastening
  • Enhanced durability with Rockwell R108 hardness rating for reliable performance under mechanical stress
  • Full regulatory compliance with RoHS 3 and REACH standards for global market acceptance
  • Optimal load distribution through sleeve design (0.185" OD, 0.312" height) protecting surfaces from damage

Professional Applications & Engineering Value

This Nylon 6/6 plastic sleeve washer addresses critical engineering challenges in industrial and electronic applications where metal fasteners fall short. The sleeve-type design provides superior insulation against electrical conductivity while the off-white nylon construction offers excellent resistance to corrosion, chemicals, and UV degradation. Engineered specifically for No. 4 screw applications, this washer maintains dimensional stability across extreme temperature fluctuations from -40°F to 180°F, making it ideal for outdoor equipment, automotive components, and electrical enclosures. The combination of Rockwell R108 hardness and precise inch-system dimensions ensures reliable performance in vibration-prone environments where consistent fastener integrity is paramount.

Specification Summary & Compliance

This sleeve washer features precise inch-system dimensions including 0.125" ID, 0.312" OD, and 0.058" thickness with overall height of 0.37". The sleeve-specific measurements include 0.185" OD and 0.312" height. Manufactured from Nylon 6/6 plastic with Rockwell R108 hardness rating, the component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance for industrial and electronic applications.

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