S-90472A130 0.406" ID x 0.812" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 17-7 PH stainless steel construction for long-lasting performance in harsh environments
• Superior mechanical strength with Rockwell C40 hardness to withstand high loads and prevent deformation
• Precise dimensional accuracy with 0.406" ID and 0.812" OD ensuring perfect fit for 3/8" screws
• Industry-standard compliance with ASME B18.21.1 specifications for reliable performance in demanding applications
• Environmental regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Optimized load distribution through flat washer design to prevent surface damage and maintain joint integrity
• Consistent thickness control between 0.051-0.080" for uniform pressure distribution and reliable sealing

Professional Applications & Engineering Value

These 17-7 PH stainless steel SAE flat washers deliver critical engineering solutions where corrosion resistance and mechanical strength are paramount. The precipitation-hardening stainless steel construction provides exceptional durability in chemical processing, marine environments, and aerospace applications where standard washers would fail. The ASME B18.21.1 compliance ensures dimensional precision and performance reliability for 3/8" screw assemblies requiring consistent load distribution. Engineered to prevent galvanic corrosion while maintaining Rockwell C40 hardness under extreme conditions, these washers solve common industrial challenges of joint loosening, surface damage, and material degradation in heavy-duty applications.

Specification Summary & Compliance

Manufactured to exact ASME B18.21.1 standards with inch system dimensions: 0.406" ID, 0.812" OD, and thickness range of 0.051-0.080". The washers maintain Class 2A thread fit tolerance for 3/8" screw applications and feature 17-7 PH stainless steel material with Rockwell C40 hardness. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance for global industrial use.