S-91122A228 26 mm ID Square Washers

Square Washers

1283FA00027 Square Washers
1283FA00027 Square Washers

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

Part No.
Part No. 1283FA00027
Equivalent to mcmaster :
91122A228

Basic Information

System of Measurement Metric
Washer Type Square

Dimension Parameters

ID 26 mm
Thickness 6.0 mm
Width 50 mm

Material & Strength Parameters

Material 18-8 Stainless Steel
Hardness Rockwell B84

Installation & Application Parameters

For Screw Size M20

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
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 with a 50mm width square design, reducing surface pressure and preventing material damage in heavy-duty assemblies.
  • Superior corrosion resistance from 18-8 Stainless Steel, ensuring long-term reliability in harsh industrial environments.
  • Precise fit for M20 metric screws with a 26mm inner diameter, facilitating quick installation and secure fastening.
  • Exceptional durability backed by Rockwell B84 hardness, resisting deformation under high stress and repetitive use.
  • Optimal thickness of 6.0mm provides robust support, maintaining fastener integrity in demanding applications.
  • Compliance with environmental standards, including RoHS 3 and REACH, ensuring safe and sustainable use across global industries.
  • Versatile metric sizing allows seamless integration into international engineering projects and machinery.

Professional Applications & Engineering Value

This 18-8 Stainless Steel square washer is engineered to address common industrial challenges, such as vibration loosening and joint failure. Its square shape offers a larger bearing surface compared to round washers, effectively distributing clamp load and minimizing embedding in soft materials. The M20 metric compatibility and precise 26mm ID ensure accurate alignment with standard screws, reducing assembly time and errors. Made from corrosion-resistant stainless steel, it excels in applications like construction, machinery, and automotive systems, where exposure to moisture and chemicals is frequent. The heavy-duty design with 6.0mm thickness and Rockwell B84 hardness withstands extreme pressures, providing reliable performance in structural bolting and equipment maintenance, thereby extending service life and reducing downtime.

Specification Summary & Compliance

This square washer features a metric system with an inner diameter of 26mm, thickness of 6.0mm, and width of 50mm, designed for M20 screw sizes. It adheres to standard dimensional tolerances for precise fit and function. Manufactured from 18-8 Stainless Steel with a hardness of Rockwell B84, it meets industry requirements for strength and durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in environmentally conscious industrial applications worldwide.

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