S-94744A635 1.313" ID x 3.5" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Precise dimensional fit with 1.313" inner diameter ensuring secure seating on 1 1/4" screws without slippage
• Optimal load distribution through large 3.5" outer diameter design, minimizing surface damage and material stress
• Consistent thickness tolerance (0.234-0.266") providing uniform compression and reliable joint integrity
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed mechanical performance
• Environmental regulation adherence meeting RoHS 3 and REACH requirements for safe industrial usage
• Heavy-duty construction suitable for high-stress applications requiring durable fastening solutions

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers exceptional engineering value in demanding industrial settings where corrosion resistance and load distribution are critical. The heavy-duty construction addresses common challenges of surface damage and joint failure by providing a robust barrier between fastener and substrate. The precisely engineered 1.313" ID ensures perfect compatibility with 1 1/4" screws, eliminating installation issues while the substantial 3.5" OD effectively distributes clamping force across wider surfaces. Ideal for structural assemblies, machinery mounting, and equipment maintenance, this ASME B18.21.1 compliant washer prevents galvanic corrosion and maintains joint integrity in environments exposed to moisture, chemicals, and temperature variations.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with inch system measurements: 1.313" inner diameter, 3.5" outer diameter, and thickness range of 0.234-0.266". The zinc-plated steel construction provides consistent mechanical properties without hardness rating requirements. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and fully REACH (EC 1907/2006) compliant with current SVHC requirements as of January 2023, ensuring environmental safety and regulatory acceptance for industrial procurement.