S-95395A290 1.031" ID x 2" OD Oversized Washers

Oversized Washers

1248FA00553 Oversized Washers
1248FA00553 Oversized Washers

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

Part No.
Part No. 1248FA00553
Equivalent to mcmaster :
95395A290

Basic Information

System of Measurement Inch
Washer Type Flat

Dimension Parameters

ID 1.031"
OD 2"
Thickness 0.167-0.193"

Material & Strength Parameters

Material Brass
Hardness Rockwell B60

Installation & Application Parameters

For Screw Size 1"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) compliant with exemption 6(c) - Lead in copper alloy
REACH REACH (EC 1907/2006) (01/17/2023, 233 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 high-quality brass material, ensuring long-term reliability in harsh environments.
  • Excellent electrical conductivity ideal for electrical and grounding applications where consistent performance is critical.
  • Enhanced load distribution with a 2" OD and precise 1.031" ID, reducing surface pressure and preventing fastener loosening.
  • Durable mechanical strength due to Rockwell B60 hardness, providing reliable performance under heavy-duty conditions.
  • Wide compatibility designed for 1" screw sizes in inch measurement systems, ensuring easy integration.
  • Strict environmental compliance meeting RoHS 3 and REACH standards, safe for regulated industries.
  • Consistent dimensional accuracy with thickness ranging 0.167-0.193", guaranteeing uniform fit and function.

Professional Applications & Engineering Value

This brass flat washer is engineered to address common industrial challenges such as galvanic corrosion, electrical isolation failures, and mechanical stress concentration. The copper alloy construction inherently resrust and oxidation, making it perfect for marine, chemical processing, and outdoor applications. Its flat washer design with precise 1.031" ID and 2" OD ensures optimal load spreading, protecting surfaces and maintaining bolt preload in vibrating machinery. Additionally, the excellent electrical conductivity supports critical use in electrical enclosures, grounding systems, and electronics assembly, where both corrosion resistance and reliable current flow are mandatory. By combining material advantages with exact inch system dimensions, this washer delivers long-term value in demanding sectors like aerospace, automotive, and industrial equipment manufacturing.

Specification Summary & Compliance

This washer conforms to standard flat washer dimensional tolerances for inch-based systems, with an inner diameter of 1.031", outer diameter of 2", and thickness between 0.167" and 0.193". It is manufactured from brass with a hardness of Rockwell B60 and is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloys, and REACH (EC 1907/2006) as of January 17, 2023, covering 233 SVHCs.

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