S-98370A011 0.188" ID x 0.438" OD Oversized Washers
Oversized 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 with 18-8 stainless steel construction, ideal for harsh or humid industrial environments.
- Enhanced load distribution from precise 0.188" ID and 0.438" OD dimensions, preventing surface damage and loosening under vibration.
- Exceptional mechanical strength with Rockwell B83 hardness, ensuring long-term reliability in demanding applications.
- Wide compatibility designed specifically for No. 8 screws, simplifying inventory and assembly processes.
- Strict environmental compliance meeting RoHS 3 and REACH standards, safe for global supply chains and regulated industries.
- Consistent dimensional accuracy with thickness ranging 0.064-0.083", providing uniform performance across batches.
- Durable flat washer design offering excellent wear resistance and extended service life in mechanical assemblies.
Professional Applications & Engineering Value
Engineered for precision and endurance, these 18-8 stainless steel flat washers deliver critical protection against galvanic corrosion and stress cracking in industrial settings. The optimized inner diameter (0.188" ID) and outer diameter (0.438" OD) ensure perfect alignment with No. 8 screws, distributing clamp load evenly to prevent joint failure. With Rockwell B83 hardness, they withstand repeated torque and vibration in machinery, automotive, and electrical enclosures. The corrosion-resistant material performs reliably outdoors or in chemical exposure, reducing maintenance costs and downtime. These inch-system washers are indispensable for OEMs and MRO teams seeking compliant, high-strength fastening solutions.
Specification Summary & Compliance
This flat washer adheres to inch measurement standards with ID 0.188", OD 0.438", and thickness 0.064-0.083". Manufactured from 18-8 stainless steel with Rockwell B83 hardness, it meets mechanical performance requirements for general engineering. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no restricted substances are present. Suitable for use with No. 8 screw size in various industrial assemblies.
