S-90377A127 0.25" ID x 0.562" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction with black-oxide coating, ideal for harsh industrial environments
• Excellent load distribution with precise 0.25" ID and 0.562" OD dimensions, preventing surface damage and maintaining joint integrity
• Consistent performance ensured by Rockwell B68 hardness rating, providing reliable mechanical strength and durability
• Perfect fit compatibility specifically designed for No. 12 screws, ensuring secure fastening and vibration resistance
• Environmental compliance with RoHS 3 and REACH regulations, meeting international safety standards for industrial applications
• Dimensional precision with controlled thickness range (0.040-0.060"), guaranteeing uniform performance across batches
• Long-term reliability through inch system standardization, ensuring interchangeability and maintenance efficiency

Professional Applications & Engineering Value

These black-oxide 18-8 stainless steel flat washers deliver exceptional engineering value in demanding applications where corrosion resistance and mechanical reliability are paramount. The stainless steel core material combined with the protective black-oxide surface treatment creates a robust barrier against moisture, chemicals, and environmental degradation, significantly extending service life in industrial settings. Engineered with precise 0.25" inner diameter and 0.562" outer diameter, these washers effectively distribute clamping forces for No. 12 screw installations, preventing surface indentation and maintaining structural integrity in assembly operations. The controlled thickness tolerance ensures consistent performance in automotive, machinery, and construction applications where vibration resistance and long-term fastening security are critical requirements.

Specification Summary & Compliance

This flat washer features inch system dimensions with 0.25" ID, 0.562" OD, and 0.040-0.060" thickness range, manufactured from 18-8 stainless steel with Rockwell B68 hardness. The product is specifically designed for No. 12 screw size applications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across various industrial sectors while meeting international compliance standards for hazardous substance restrictions.