S-91525A328 0.406" ID x 0.875" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments
• Precise dimensional fit with 0.406" ID and 0.875" OD ensuring secure seating for 3/8" screws
• Enhanced load distribution from 0.110-0.140" thickness range, reducing surface stress and preventing fastener loosening
• Exceptional mechanical durability with Rockwell B68 hardness for long-term performance under vibration and heavy loads
• Full regulatory compliance with RoHS 3 and REACH standards, safe for industrial and international applications
• Reliable inch system compatibility for seamless integration with existing 3/8" fastener assemblies
• Reduced maintenance costs through excellent pitting and crevice corrosion resistance in demanding conditions

Professional Applications & Engineering Value

Engineered for critical applications where corrosion resistance and structural integrity are paramount, these 316 stainless steel flat washers provide exceptional performance in chemical processing, marine equipment, and offshore installations. The inch system dimensions (0.406" ID × 0.875" OD) ensure perfect compatibility with 3/8" screws, while the controlled 0.110-0.140" thickness maintains uniform pressure distribution across mating surfaces. This prevents galvanic corrosion in mixed-material assemblies and extends service life in high-humidity environments. The Rockwell B68 hardness guarantees dimensional stability under sustained loads, making these flat washers ideal for vibration-prone machinery, structural fastening systems, and industrial equipment requiring reliable chemical resistance.

Specification Summary & Compliance

This flat washer maintains precise inch system tolerances with internal diameter of 0.406", outer diameter of 0.875", and thickness range of 0.110-0.140" for 3/8" screw applications. Manufactured from 316 stainless steel with Rockwell B68 hardness rating, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations (updated 06/14/2023, 235 SVHC), ensuring environmental safety and international market acceptance for industrial components.