S-91950A053 1.25" ID x 2.25" OD ASME B18.21.1 SAE Washers

SAE Washers

1251FA00178 SAE Washers
1251FA00178 SAE Washers

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

Part No.
Part No. 1251FA00178
Equivalent to mcmaster :
91950A053

Basic Information

System of Measurement Inch
Washer Type Flat
Washer Designation SAE
Specifications Met ASME B18.21.1

Dimension Parameters

ID 1.25"
OD 2.25"
Thickness 0.108-0.160"

Material & Strength Parameters

Material 316 Stainless Steel
Hardness Not Rated

Installation & Application Parameters

For Screw Size 1 1/8"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (06/10/2022, 224 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 in harsh environments due to 316 stainless steel construction, ideal for marine, chemical, and outdoor applications
  • Enhanced load distribution with precise 2.25" outer diameter, reducing surface pressure and preventing damage to assembled materials
  • Accurate fit for 1 1/8" screws with 1.25" inner diameter, ensuring secure fastening and minimizing loosening risks
  • Durable mechanical performance with consistent 0.108-0.160" thickness, providing reliable spacing and vibration resistance
  • Compliance with ASME B18.21.1 standards for dimensional accuracy and interchangeability in industrial assemblies
  • Environmental and workplace safety with full RoHS 3 and REACH compliance, free from hazardous substances
  • Long-term reliability in SAE inch-system applications, reducing maintenance needs and replacement costs

Professional Applications & Engineering Value

These 316 stainless steel SAE flat washers deliver exceptional engineering value by addressing common industrial challenges such as galvanic corrosion, chemical exposure, and mechanical stress. The high-grade 316 material offers superior resistance to pitting and crevice corrosion, making these inch-system washers ideal for demanding sectors like offshore equipment, food processing machinery, and chemical plant installations. Their precise flat washer design ensures uniform load distribution under 1 1/8" screw fasteners, preventing joint failure and surface indentation. By incorporating ASME B18.21.1 dimensional standards, these components guarantee compatibility and performance consistency in heavy-duty assemblies, reducing downtime and enhancing operational safety in corrosive or high-moisture environments.

Specification Summary & Compliance

This SAE flat washer meets exact dimensional requirements with 1.25" inner diameter, 2.25" outer diameter, and thickness ranging from 0.108" to 0.160", manufactured in accordance with ASME B18.21.1 specifications for inch-series flat washers. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and health safety standards for industrial use.

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