S-90108A417 0.438" ID x 1" OD ASME B18.21.1 USS Washers
USS 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 protection with zinc-plated steel construction for extended service life in harsh industrial environments
- Precise dimensional compatibility with 3/8" screws ensures perfect fit and optimal load distribution
- Heavy-duty performance with 1" outer diameter providing excellent bearing surface for high-stress applications
- Manufacturing consistency guaranteed through strict adherence to ASME B18.21.1 standards
- Environmental compliance with RoHS 3 and REACH regulations for safe, sustainable operations
- Versatile thickness range (0.064-0.104") accommodates various assembly requirements and compression needs
- Reliable load distribution prevents surface damage and maintains joint integrity under vibration and stress
Professional Applications & Engineering Value
These USS flat washers deliver critical engineering solutions for industrial applications where load distribution and corrosion resistance are paramount. The zinc-plated steel construction provides exceptional protection against environmental degradation, while the precise 1" OD and 0.438" ID dimensions ensure perfect compatibility with 3/8" screws in mechanical assemblies. Engineered to prevent surface damage and maintain joint integrity, these washers solve common industrial challenges including material embedding, loosening under vibration, and premature fastener failure. The ASME B18.21.1 compliance guarantees dimensional accuracy and performance reliability across construction, machinery, and heavy equipment applications where consistent washer performance is non-negotiable.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 standards with inch system dimensions: 1" outer diameter, 0.438" inner diameter, and thickness range of 0.064-0.104". These flat washers feature zinc-plated steel construction and are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The washers are specifically designed for use with 3/8" screws and meet industrial-grade specifications for mechanical applications requiring reliable load distribution and surface protection.
