S-91950A055 1.5" ID x 2.75" OD SAE Washers

SAE Washers

1251FA00180 SAE Washers
1251FA00180 SAE Washers

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

Part No.
Part No. 1251FA00180
Equivalent to mcmaster :
91950A055

Basic Information

System of Measurement Inch
Washer Type Flat
Washer Designation SAE

Dimension Parameters

ID 1.5"
OD 2.75"
Thickness 0.136-0.213"

Material & Strength Parameters

Material 316 Stainless Steel
Hardness Not Rated

Installation & Application Parameters

For Screw Size 1 3/8"

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
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance from 316 stainless steel construction, ideal for harsh chemical and marine environments
  • Exceptional load distribution with 2.75" outer diameter, preventing surface damage and fastener loosening
  • Precise compatibility with 1 3/8" screws through accurate 1.5" inner diameter sizing
  • Heavy-duty durability with thickness ranging 0.136-0.213" for demanding industrial applications
  • Standardized reliability meeting SAE specifications for consistent performance and interchangeability
  • Environmental compliance with RoHS 3 and REACH regulations for safe industrial usage
  • Long-term cost efficiency through material longevity and reduced maintenance requirements

Professional Applications & Engineering Value

This SAE flat washer in 316 stainless steel provides critical engineering solutions where corrosion resistance and structural integrity are paramount. The heavy-duty construction effectively distributes clamping force across wider surfaces, preventing joint failure and material deformation in high-stress assemblies. Particularly valuable in chemical processing, marine equipment, and food processing industries, the washer's inch system dimensions (1.5" ID x 2.75" OD) ensure perfect compatibility with standard 1 3/8" screw applications. The 316 stainless steel material offers superior performance in chloride-exposed environments where standard stainless alloys would fail, making it an essential component for permanent installations requiring decades of reliable service without degradation.

Specification Summary & Compliance

Manufactured to SAE standards with precise dimensional tolerances, this flat washer features 1.5" inner diameter, 2.75" outer diameter, and thickness range of 0.136-0.213". The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide. The 316 stainless steel construction provides inherent corrosion resistance without additional surface treatments, maintaining performance integrity across temperature variations and demanding service conditions.

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