S-99041A221 0.469" ID Square Washers

Square Washers

1283FA00178 Square Washers
1283FA00178 Square Washers

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

Part No.
Part No. 1283FA00178
Equivalent to mcmaster :
99041A221

Basic Information

System of Measurement Inch
Washer Type Square

Dimension Parameters

ID 0.469"
Thickness 0.112-0.127"
Width 2"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Rockwell B40

Installation & Application Parameters

For Screw Size 7/16"

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
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Key Features & Benefits at a Glance

  • Superior corrosion protection with zinc-plated steel construction for extended service life in harsh environments
  • Exceptional load distribution from the 2" square design that prevents surface damage and maintains joint integrity
  • Precision fit with 0.469" inner diameter ensuring perfect alignment with 7/16" fasteners
  • Consistent performance guaranteed by Rockwell B40 hardness for reliable mechanical strength
  • Enhanced durability with thickness ranging from 0.112" to 0.127" for optimal compression resistance
  • Global compliance assurance meeting RoHS 3 and REACH environmental standards for international projects
  • Industrial-grade reliability in inch measurement system for seamless integration with existing equipment

Professional Applications & Engineering Value

This zinc-plated steel square washer delivers critical engineering solutions for industrial assembly challenges. The 2" square configuration provides significantly larger surface contact than round washers, effectively distributing clamp load to prevent material deformation in structural applications. The zinc plating creates a sacrificial barrier against oxidation, making these heavy-duty washers ideal for outdoor equipment, machinery frames, and construction projects where moisture exposure is common. With precise 0.469" inner diameter matching standard 7/16" screw sizes, these components ensure perfect fastener alignment while the Rockwell B40 hardness maintains dimensional stability under sustained vibration and load cycles. The square profile also prevents rotation during torque application, streamlining installation in high-volume production environments.

Specification Summary & Compliance

Manufactured to inch system standards with 0.469" inner diameter and 0.112-0.127" thickness range for precision fit. Material hardness certified to Rockwell B40 specifications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates as of June 2023. Designed specifically for use with 7/16" screw sizes in industrial fastening applications.

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