S-99041A135 1.812" ID Square Washers

Square Washers

1283FA00143 Square Washers
1283FA00143 Square Washers

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

Part No.
Part No. 1283FA00143
Equivalent to mcmaster :
99041A135

Basic Information

System of Measurement Inch
Washer Type Square

Dimension Parameters

ID 1.812"
Thickness 0.220-0.280"
Width 3"

Material & Strength Parameters

Material Zinc-Plated Steel
Hardness Rockwell B40

Installation & Application Parameters

For Screw Size 1 3/4"

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) compliant with exemption 6(a) - Lead as an alloying element in steel
REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Enhanced Load Distribution - The 3" square design provides a larger surface area to evenly distribute pressure, preventing surface damage and loosening under heavy loads.
  • Superior Corrosion Resistance - Zinc-plated steel construction offers reliable protection against rust and environmental wear, extending the component's service life.
  • Precise Fit and Secure Fastening - With an ID of 1.812", it ensures a perfect match for 1 3/4" screws, reducing vibration and maintaining joint integrity.
  • Exceptional Mechanical Strength - A Rockwell B40 hardness rating guarantees high durability and resistance to deformation under significant stress.
  • Optimized Thickness for Stability - The 0.220-0.280" thickness range provides robust support without adding unnecessary bulk, ideal for space-constrained assemblies.
  • Compliance with Global Standards - Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries and international markets.
  • Versatile Industrial Application - Designed for heavy-duty use in construction and machinery, offering reliable performance in demanding environments.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to address common industrial challenges such as joint failure and material fatigue. Made from zinc-plated steel, it combats corrosion in harsh environments, while its square shape and precise 1.812" ID ensure optimal alignment and load distribution for 1 3/4" screws. The Rockwell B40 hardness and substantial thickness prevent crushing and deformation under high torque or dynamic loads, making it ideal for construction, heavy machinery, and structural fastening applications. By minimizing stress concentration, it enhances the longevity and reliability of assembled components, reducing maintenance needs and downtime in professional settings.

Specification Summary & Compliance

This square washer features an ID of 1.812", width of 3", and thickness of 0.220-0.280", manufactured to inch system standards for precise fit. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and is REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations for industrial use.

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