S-91201A040 1.281" ID x 2.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 2.25" OD and 1.281" ID for superior surface coverage and reduced material stress
• Enhanced durability from Rockwell B84 hardness steel ensuring long-term performance under heavy loads
• Precision dimensional control with 0.308-0.318" thickness for consistent seating and reliable fastening
• Optimized compatibility specifically engineered for 1-1/4" screw applications in industrial settings
• Full regulatory compliance with RoHS 3 and REACH standards for safe global industrial use
• Superior corrosion resistance through high-quality steel construction for extended service life
• Heavy-duty performance designed to withstand extreme mechanical stresses in demanding applications

Professional Applications & Engineering Value

This heavy-duty steel flat washer delivers critical engineering solutions for industrial applications where vibration resistance and load distribution are paramount. The precisely engineered 1.281" ID and 2.25" OD dimensions ensure optimal surface contact, preventing material deformation and maintaining joint integrity under extreme conditions. Manufactured from high-hardness steel (Rockwell B84), this washer provides exceptional resistance to embedding and deformation, making it ideal for construction equipment, heavy machinery, structural steel connections, and industrial assembly applications. The controlled 0.308-0.318" thickness guarantees consistent performance across batch productions, while the inch system compatibility ensures seamless integration with North American industrial standards and equipment specifications.

Specification Summary & Compliance

This precision flat washer features dimensional specifications of 1.281" inner diameter, 2.25" outer diameter, and 0.308-0.318" thickness range, engineered for 1-1/4" screw size applications. The washer meets industrial hardness standards with Rockwell B84 rating and maintains full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel, along with complete REACH (EC 1907/2006) compliance as of January 17, 2023, covering 233 Substances of Very High Concern. Manufactured to inch system specifications for North American industrial applications.