S-98119A115 3.157" ID x 5.5" OD ASTM F436 Type 1 Structural Washers
Structural Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance from hot-dipped galvanized steel coating, extending service life in harsh environments
- Exceptional load distribution with 5.5" OD and 0.240-0.340" thickness range, preventing surface damage and joint loosening
- Precise compatibility with 3" screw sizes through 3.157" ID, ensuring secure fastening in structural applications
- High mechanical strength with Rockwell C38 hardness, maintaining integrity under heavy loads and vibration
- Industry-standard reliability meeting ASTM F436 Type 1 specifications for consistent performance in critical assemblies
- Environmental compliance with RoHS 3 and REACH regulations, ensuring safe use in regulated industrial sectors
- Dimensional stability across thickness variations, providing reliable sealing and spacing functions
Professional Applications & Engineering Value
This hot-dipped galvanized steel flat washer delivers critical protection against galvanic corrosion and environmental degradation in structural applications including bridge construction, heavy machinery assembly, and industrial plant maintenance. The ASTM F436 Type 1 certification ensures consistent mechanical properties for load-bearing joints, while the substantial outer diameter (5.5") effectively distributes clamping force to prevent surface indentation and maintain bolt preload. Engineered for 3" screw sizes with precise inner diameter (3.157"), this heavy-duty washer solves common challenges of joint relaxation and corrosion-induced failure in outdoor and high-moisture environments, making it ideal for civil engineering projects and industrial equipment requiring long-term reliability.
Specification Summary & Compliance
Manufactured to ASTM F436 Type 1 standards with dimensional specifications including 3.157" ID, 5.5" OD, and 0.240-0.340" thickness range. Features Rockwell C38 hardness for consistent mechanical performance and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Designed specifically for use with 3" screw sizes in inch measurement system applications.
