S-93012A402 0.188" ID x 0.438" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with galvanized steel construction for extended service life in harsh environments
• Precise dimensional fit with 0.188" ID specifically engineered for No. 8 screws to prevent loosening
• Optimal load distribution through 0.438" OD design that minimizes surface pressure and material stress
• Consistent performance guaranteed by ASME B18.21.1 standard compliance for reliable mechanical applications
• Environmental compliance assurance with RoHS 3 and REACH regulations for safe industrial usage
• Versatile thickness range (0.036-0.065") accommodating various assembly requirements and tolerances
• Enhanced durability through zinc coating that resists rust and maintains structural integrity

Professional Applications & Engineering Value

These SAE flat washers provide critical engineering solutions for industrial assemblies requiring reliable load distribution and corrosion resistance. The galvanized steel construction with zinc coating offers exceptional protection against environmental degradation, making them ideal for outdoor equipment, automotive components, and machinery exposed to moisture. Their precise 0.188" inner diameter ensures perfect compatibility with No. 8 screws, eliminating play and maintaining fastener integrity under vibration. The 0.438" outer diameter creates an optimal bearing surface that prevents embedding in softer materials and distributes clamping forces evenly. These inch system washers deliver consistent performance in mechanical systems where dimensional accuracy and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standard specifications with dimensional tolerances maintained throughout production. The washers feature precise flat washer geometry with 0.188" inner diameter, 0.438" outer diameter, and thickness ranging from 0.036" to 0.065". Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance adherence. Designed specifically for use with No. 8 screw sizes in inch measurement systems.