S-90313A104 0.203" ID x 1" OD Oversized Washers

Oversized Washers

1248FA00013 Oversized Washers
1248FA00013 Oversized Washers

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

Part No.
Part No. 1248FA00013
Equivalent to mcmaster :
90313A104

Basic Information

System of Measurement Inch
Washer Type Flat

Dimension Parameters

ID 0.203"
OD 1"
Thickness 0.033-0.047"

Material & Strength Parameters

Material 18-8 Stainless 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
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Key Features & Benefits at a Glance

  • Superior corrosion resistance from 18-8 stainless steel ensures long-term reliability in humid or chemically aggressive environments.
  • Precise dimensional fit with 0.203" ID and 1" OD guarantees secure seating and even load distribution for No. 10 screws.
  • Consistent thickness control (0.033-0.047") provides uniform pressure and prevents joint loosening under vibration.
  • Excellent durability maintains structural integrity and surface finish through repeated assembly cycles.
  • Full regulatory compliance with RoHS 3 and REACH standards ensures safe use in global industrial supply chains.
  • Broad material compatibility works effectively with various substrates without galvanic corrosion risks.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 18-8 stainless steel flat washers solve critical fastening challenges where corrosion resistance and dimensional precision are paramount. The inch-system dimensions (0.203" ID × 1" OD) ensure perfect compatibility with No. 10 screw sizes in machinery assembly, electrical enclosures, and structural frameworks. The controlled thickness variation prevents stress concentration points that lead to material fatigue, while the stainless steel construction eliminates rust-induced failures in outdoor or chemical processing equipment. These flat washers deliver reliable performance in HVAC systems, marine hardware, and food processing installations where environmental compliance and long-term maintenance reduction are key engineering priorities.

Specification Summary & Compliance

Manufactured to standard inch-system tolerances with ID 0.203", OD 1", and thickness range 0.033-0.047" specifically for No. 10 screw applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current substance restriction requirements (235 SVHC as of 06/14/2023). Material specification conforms to standard 18-8 stainless steel properties for industrial fastener applications.

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