S-90474A155 0.812" ID x 2.5" OD ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with galvanized steel construction for extended service life in harsh environments
• Exceptional load distribution thanks to 2.5" outer diameter preventing surface damage and joint loosening
• Precise 0.812" inner diameter fit ensures perfect alignment with 3/4" screws for secure fastening
• Enhanced mechanical durability with Rockwell B80 hardness resisting deformation under heavy loads
• Reliable thickness tolerance (0.136-0.192") provides consistent performance in industrial assemblies
• Full regulatory compliance meeting RoHS 3 and REACH standards for global supply chain integration
• Heavy-duty construction delivers long-term reliability in high-vibration applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these galvanized steel flat washers provide critical corrosion resistance where moisture, chemicals, or outdoor exposure would compromise ordinary fasteners. The zinc coating creates a sacrificial barrier that significantly extends service life in construction, machinery, and infrastructure applications. With their 2.5" outer diameter, these washers distribute clamping force over a wider area, preventing surface damage to soft materials and maintaining joint integrity in high-vibration settings. The precise 0.812" inner diameter ensures perfect alignment with 3/4" screws, eliminating installation issues while the controlled thickness variation guarantees consistent performance across production runs. These heavy-duty washers solve common engineering challenges including galvanic corrosion, joint relaxation, and material deformation in structural assemblies.

Specification Summary & Compliance

Manufactured to inch system standards with critical dimensions of 0.812" ID, 2.5" OD, and thickness ranging 0.136-0.192" specifically designed for 3/4" screw applications. The galvanized steel construction delivers Rockwell B80 hardness for mechanical reliability. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures these flat washers meet the latest environmental and safety standards for industrial components.