S-90108A037 0.938" ID x 2.25" OD ASME B18.21.1 USS Washers

USS Washers

1253FA00010 USS Washers
1253FA00010 USS Washers

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

Part No.
Part No. 1253FA00010
Equivalent to mcmaster :
90108A037

Basic Information

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

Dimension Parameters

ID 0.938"
OD 2.25"
Thickness 0.136-0.192"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Not Rated

Installation & Application Parameters

For Screw Size 7/8"

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 corrosion protection with zinc plating that extends service life in demanding industrial environments
  • Optimal load distribution with 2.25" outer diameter providing excellent surface coverage for 7/8" fasteners
  • Precise dimensional fit featuring 0.938" inner diameter ensuring proper alignment and secure fastening
  • Heavy-duty construction using steel material for reliable performance in high-stress applications
  • Industry-standard compliance manufactured to ASME B18.21.1 specifications for guaranteed quality and interchangeability
  • Environmental responsibility with full RoHS 3 and REACH compliance for sustainable procurement
  • Versatile thickness range from 0.136" to 0.192" accommodating various assembly requirements and compression needs

Professional Applications & Engineering Value

These USS flat washers deliver exceptional engineering value in heavy-duty industrial applications where reliable load distribution and corrosion resistance are critical. The zinc-plated steel construction provides superior protection against environmental factors, significantly reducing maintenance requirements in outdoor or corrosive environments. Engineered specifically for 7/8" screw applications, these washers prevent surface damage, reduce stress concentration, and maintain joint integrity in structural assemblies, construction projects, and mechanical equipment. The ASME B18.21.1 compliance ensures dimensional consistency and performance reliability across industrial maintenance, manufacturing, and infrastructure projects, making them an essential component for professional contractors and engineers seeking durable fastening solutions.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications with 0.938" inner diameter, 2.25" outer diameter, and thickness ranging from 0.136" to 0.192". Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance reliability in inch system applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use across industrial sectors.

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