S-90339A140 Easy-Install Slotted Washers
Easy-Install Slotted Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Geometric Parameters
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Key Features & Benefits at a Glance
- Superior corrosion protection with black-oxide steel finish, ideal for harsh industrial environments
- Exceptional mechanical strength from Rockwell C55 hardness, resisting deformation under heavy loads
- Precise compatibility with 7/16" and 1/2" screws, ensuring secure fastening in demanding applications
- Optimized slot dimensions (17/32" width, 1 3/16" depth) for easy tool access and quick assembly
- Consistent thickness tolerance (0.359-0.391") for uniform load distribution and vibration resistance
- Compliance with global regulations including RoHS 3 and REACH, meeting international supply chain requirements
- Heavy-duty construction with 2" outer diameter, providing maximum bearing surface for structural stability
Professional Applications & Engineering Value
Engineered for industrial machinery, structural assemblies, and heavy equipment, these slotted washers address critical challenges in high-vibration environments. The black-oxide steel surface treatment creates a durable barrier against moisture and chemical exposure, significantly extending service life in corrosive conditions. With Rockwell C55 hardness, the washer maintains dimensional stability under extreme pressure, preventing fastener loosening in dynamic loads. The precisely machined 17/32" slot width and 1 3/16" slot depth enable rapid installation with standard tools, reducing assembly time while ensuring reliable performance for 7/16" and 1/2" screws in inch-system applications.
Specification Summary & Compliance
Manufactured to inch-system standards with controlled thickness tolerance (0.359-0.391"), these washers ensure precise fit and function. The black-oxide steel construction meets industry requirements for corrosion resistance while maintaining Rockwell C55 hardness for mechanical durability. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006) regulations as of 01/17/2023, supporting global manufacturing and supply chain compliance.
