S-98040A112 31 mm ID x 48 mm 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 black-oxide steel coating, extending service life in harsh industrial environments
- Exceptional load distribution from precise 31mm ID x 48mm OD dimensions, preventing surface damage under M30 fasteners
- Enhanced durability with Rockwell 15N80 hardness rating, maintaining structural integrity under heavy loads
- Reliable thickness consistency (6.0-6.9mm) ensuring uniform clamping force and vibration resistance
- Environmental compliance meeting RoHS 3 and REACH standards for safe global manufacturing applications
- Optimized metric sizing for perfect compatibility with M30 screw assemblies in international projects
- Heavy-duty construction providing long-term reliability in high-stress mechanical applications
Professional Applications & Engineering Value
This black-oxide steel flat washer delivers critical engineering solutions for industrial applications where corrosion resistance and load distribution are paramount. The M30-compatible metric washer features precise dimensional control (31mm ID × 48mm OD) that prevents fastener embedment and surface damage in heavy machinery assemblies. The Rockwell 15N80 hardness rating ensures consistent performance under extreme vibration and load conditions, while the black-oxide surface treatment provides superior protection against moisture and chemical exposure in manufacturing, construction, and automotive environments. Engineered for heavy-duty applications, this washer maintains bolt preload and joint integrity where standard washers would fail.
Specification Summary & Compliance
Manufactured to precise metric dimensions: 31mm internal diameter × 48mm outer diameter × 6.0-6.9mm thickness, specifically designed for M30 screw applications. Material specifications include black-oxide steel with Rockwell 15N80 hardness certification. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) regulations (updated 01/17/2023, 233 SVHC). This flat washer meets international metric standards for dimensional accuracy and environmental safety in industrial fastener systems.
