S-91122A226 18 mm ID Square Washers

Square Washers

1283FA00025 Square Washers
1283FA00025 Square Washers

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

Part No.
Part No. 1283FA00025
Equivalent to mcmaster :
91122A226

Basic Information

System of Measurement Metric
Washer Type Square

Dimension Parameters

ID 18 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 M14

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

  • Superior corrosion resistance from 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments
  • Exceptional load distribution with a 50mm width and square shape, minimizing surface pressure and material stress
  • Enhanced durability with Rockwell B84 hardness, providing excellent resistance to wear and deformation
  • Precise M14 screw compatibility featuring an 18mm inner diameter for secure, accurate fitment
  • Robust structural support from 6.0mm thickness, ideal for heavy-duty industrial applications
  • Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries
  • Metric system standardization for seamless integration with international equipment and specifications

Professional Applications & Engineering Value

This 18-8 stainless steel square washer delivers critical engineering solutions for industrial applications where corrosion resistance and structural integrity are paramount. The square washer design provides superior surface contact compared to round washers, effectively distributing clamp load across wider areas to prevent material embedding and joint loosening under vibration. With its M14 screw compatibility and 18mm ID, it ensures precise fitment in machinery assembly, construction frameworks, and heavy equipment manufacturing. The corrosion-resistant properties of 18-8 stainless steel make it ideal for outdoor applications, chemical processing environments, and marine settings where moisture and corrosive elements would compromise ordinary fasteners. The substantial 6.0mm thickness and 50mm width provide exceptional bearing surface for high-stress connections, reducing the risk of bolt pull-through and maintaining joint integrity in demanding operational conditions.

Specification Summary & Compliance

This metric square washer features precision dimensions with 18mm inner diameter, 50mm width, and 6.0mm thickness specifically engineered for M14 screw applications. Manufactured from 18-8 Stainless Steel with Rockwell B84 hardness for consistent mechanical properties. The product fully complies with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical substances, ensuring environmental responsibility and workplace safety compliance for industrial users worldwide.

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