S-93852A101 0.25" ID x 0.562" OD USS Washers

USS Washers

1253FA00079 USS Washers
1253FA00079 USS Washers

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

Part No.
Part No. 1253FA00079
Equivalent to mcmaster :
93852A101

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 18-8 Stainless Steel
Hardness Rockwell B68

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
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Key Features & Benefits at a Glance

  • Superior corrosion resistance from 18-8 stainless steel construction for long-lasting performance in harsh environments
  • Excellent load distribution with USS flat washer design to prevent surface damage and fastener loosening
  • Consistent dimensional accuracy with 0.25" ID and 0.562" OD ensuring perfect fit for No. 10 screws
  • Enhanced durability with Rockwell B68 hardness rating for reliable performance under pressure
  • Regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
  • Versatile compatibility with inch-system fasteners for seamless integration into existing assemblies
  • Optimal thickness range (0.036-0.065") providing flexibility for various spacing requirements

Professional Applications & Engineering Value

Our USS flat washers manufactured from 18-8 stainless steel deliver exceptional engineering value in demanding industrial environments. The corrosion-resistant properties make these inch washers ideal for applications exposed to moisture, chemicals, and outdoor conditions where ordinary washers would fail. The precise 0.25" ID and 0.562" OD dimensions ensure perfect alignment with No. 10 screw sizes, preventing misalignment and distributing clamping force evenly across surfaces. This flat washer design effectively reduces stress concentration, protects sensitive materials from damage, and maintains joint integrity in heavy-duty applications including machinery, construction, marine equipment, and industrial assemblies where vibration resistance and long-term reliability are critical.

Specification Summary & Compliance

This USS pattern flat washer features precise inch dimensions with 0.25" inner diameter and 0.562" outer diameter, manufactured from 18-8 stainless steel with Rockwell B68 hardness. The product maintains standard USS flat washer specifications compatible with No. 10 screw sizes and thickness ranging from 0.036" to 0.065". Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and unrestricted use across global markets.

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