S-90108A048 2.625" ID x 5" OD ASME B18.21.1 USS Washers

USS Washers

1253FA00020 USS Washers
1253FA00020 USS Washers

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

Part No.
Part No. 1253FA00020
Equivalent to mcmaster :
90108A048

Basic Information

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

Dimension Parameters

ID 2.625"
OD 5"
Thickness 0.210-0.280"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Not Rated

Installation & Application Parameters

For Screw Size 2 1/2"

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
In Stock
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Key Features & Benefits at a Glance

  • Superior load distribution with 5" outer diameter for maximum surface coverage and pressure reduction
  • Enhanced corrosion resistance through zinc-plated steel construction for extended service life
  • Precise dimensional compatibility with 2.625" inner diameter perfectly matching 2 1/2" screw sizes
  • Heavy-duty performance with robust 0.210-0.280" thickness for demanding industrial applications
  • Industry-standard compliance manufactured to ASME B18.21.1 specifications for reliable performance
  • Environmental responsibility with full RoHS 3 and REACH compliance for sustainable operations
  • Durable steel construction providing long-lasting mechanical strength and reliability

Professional Applications & Engineering Value

This heavy-duty USS flat washer delivers exceptional engineering value in demanding industrial environments where load distribution and corrosion resistance are critical. The zinc-plated steel construction provides superior protection against environmental degradation, extending component life in outdoor applications, marine environments, and industrial settings. With its substantial 5" outer diameter and precise 2.625" inner diameter, this washer effectively distributes clamping forces over larger surface areas, preventing material deformation and joint failure in structural applications, heavy machinery, and construction projects requiring 2 1/2" screw sizes. The robust thickness range ensures consistent performance under varying load conditions.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications with 2.625" inner diameter and 5" outer diameter in inch system measurements, with thickness ranging from 0.210" to 0.280". Manufactured in strict compliance with ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant with current substance restrictions as of June 14, 2023, addressing 235 Substances of Very High Concern.

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