S-90476A102 0.25" ID x 0.562" OD USS Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with USS flat design for No. 10 screws, preventing surface damage and loosening under heavy loads
• Superior corrosion resistance from zinc yellow-chromate plating, extending service life in harsh industrial environments
• Maximum durability with Rockwell C38 hardness, maintaining structural integrity under extreme pressure and vibration
• Heavy-duty performance meeting Grade 8 strength standards for critical applications requiring high tensile strength
• Precise dimensional fit with 0.25" ID and 0.562" OD, ensuring proper alignment and secure fastening in inch-system assemblies
• Environmental compliance assurance with RoHS 3 and REACH standards, supporting sustainable manufacturing practices
• Reliable material quality using plated steel construction for consistent performance across temperature variations

Professional Applications & Engineering Value

These Grade 8 USS flat washers deliver critical engineering solutions where high-strength fastening meets environmental compliance requirements. The zinc yellow-chromate plated steel construction provides superior corrosion resistance for outdoor equipment, marine applications, and industrial machinery exposed to moisture and chemicals. With Rockwell C38 hardness and Grade 8 strength classification, these washers maintain clamping force in high-vibration environments like heavy machinery, construction equipment, and automotive assemblies. The precise 0.25" ID and 0.562" OD dimensions ensure perfect compatibility with No. 10 screws in inch-system applications, preventing bolt head embedment and distributing loads effectively across softer materials. This combination of material durability and dimensional accuracy solves common industrial challenges of joint failure, corrosion-induced degradation, and maintenance downtime.

Specification Summary & Compliance

Manufactured to USS flat washer standards with precise dimensional tolerances for inch-system applications. Features 0.25" inner diameter and 0.562" outer diameter with thickness ranging 0.036-0.065". Constructed from zinc yellow-chromate plated steel with Rockwell C38 hardness and meets Grade 8 strength classification. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries and international markets.