S-91081A027 0.25" ID x 0.562" OD USS Washers

USS Washers

1253FA00051 USS Washers
1253FA00051 USS Washers

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

Part No.
Part No. 1253FA00051
Equivalent to mcmaster :
91081A027

Basic Information

System of Measurement Inch
Washer Type Flat
Washer Designation USS

Dimension Parameters

ID 0.25"
OD 0.562"
Thickness 0.036-0.065"

Material & Strength Parameters

Material Steel
Hardness Not Rated

Installation & Application Parameters

For Screw Size No. 10

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/14/2023, 235 SVHC) Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Optimal load distribution with USS standard flat design to prevent surface damage and maintain joint integrity
  • Precise fit for No. 10 screws with 0.25" ID ensuring secure fastening and reduced vibration loosening
  • Durable steel construction providing reliable strength and corrosion resistance for industrial environments
  • Versatile thickness range (0.036-0.065") accommodates various compression needs and gap tolerances
  • Full regulatory compliance with RoHS 3 and REACH standards for safe, environmentally responsible usage
  • Standardized inch dimensions ensuring compatibility with existing USS-specification assemblies and tools

Professional Applications & Engineering Value

These USS flat washers deliver critical engineering solutions where load distribution and surface protection are paramount. Manufactured from high-grade steel, they effectively prevent fastener embedding into soft materials and distribute clamping force evenly across the No. 10 screw contact area. This design minimizes stress concentration, reduces the risk of joint failure under vibration, and extends service life in heavy-duty industrial assemblies, machinery, and structural applications. The precise 0.25" ID and 0.562" OD dimensions ensure consistent performance while the RoHS and REACH compliance guarantees they meet stringent environmental and safety regulations for global supply chain integration.

Specification Summary & Compliance

This USS flat washer features inch system dimensions with 0.25" inner diameter, 0.562" outer diameter, and thickness ranging 0.036-0.065". Designed specifically for No. 10 screw sizes and manufactured to USS standard specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to the latest environmental and substance restriction standards for industrial components.

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