S-93012A121 1.25" ID x 2.25" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through hot-dipped galvanized steel coating for extended service life in harsh environments
• Exceptional load distribution with 2.25" OD providing maximum surface coverage for 1 1/8" screw applications
• Reliable mechanical performance with Rockwell B72 hardness ensuring consistent strength under pressure
• Precision dimensional compliance meeting ASME B18.21.1 specifications for guaranteed interchangeability
• Environmental responsibility with RoHS 3 compliance for safe use in regulated applications
• Optimized thickness range (0.108-0.160") providing ideal compression characteristics and vibration resistance
• Industry-standard compatibility with SAE inch system components for seamless integration

Professional Applications & Engineering Value

This hot-dipped galvanized steel SAE flat washer delivers critical protection against environmental degradation in industrial settings where moisture, chemicals, and atmospheric exposure threaten fastener integrity. The ASME B18.21.1 compliant design ensures precise dimensional control for reliable performance in heavy machinery, structural steel connections, and outdoor equipment assemblies. The substantial 2.25" outer diameter effectively distributes clamping forces across wider surfaces, preventing material deformation and maintaining joint integrity in high-vibration applications. With its Rockwell B72 hardness and robust construction, this washer withstands repeated loading cycles while the zinc coating provides sacrificial protection, significantly extending the service life of connected components in bridges, construction equipment, and marine installations.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with 1.25" ID, 2.25" OD, and thickness ranging 0.108-0.160" for consistent performance. Constructed from hot-dipped galvanized steel with Rockwell B72 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) environmental directives, ensuring restriction of hazardous substances. Designed specifically for use with 1 1/8" screws in inch system applications.