S-98370A040 1.281" ID x 2.5" OD Oversized Washers
Oversized Washers
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Optimal load distribution thanks to the large 2.5" outer diameter, preventing surface damage and joint loosening
- Precise fit for 1-1/4" screws with 1.281" inner diameter, ensuring secure fastening and vibration resistance
- Enhanced durability and wear resistance from Rockwell B83 hardness, extending service life in demanding applications
- Reliable thickness tolerance (0.261-0.286") for consistent performance and ease of installation
- Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global markets
- Heavy-duty construction designed to withstand high-stress mechanical and industrial applications
Professional Applications & Engineering Value
This heavy-duty flat washer in 18-8 stainless steel provides critical engineering solutions where corrosion resistance and structural integrity are paramount. The precise 1.281" ID and 2.5" OD dimensions ensure perfect compatibility with 1-1/4" screw applications, distributing clamp load effectively to prevent material deformation and bolt loosening under vibration. With Rockwell B83 hardness, it maintains dimensional stability in high-stress environments like heavy machinery, construction, and marine equipment. The inch system specification makes it ideal for North American industrial standards, while the corrosion-resistant properties eliminate maintenance concerns in chemical processing, outdoor infrastructure, and food processing equipment where moisture and corrosive agents are present.
Specification Summary & Compliance
This flat washer meets precise dimensional requirements with 1.281" inner diameter, 2.5" outer diameter, and thickness ranging 0.261-0.286" for consistent performance. Manufactured from 18-8 stainless steel with Rockwell B83 hardness rating, it ensures reliable mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial components.
