S-91083A040 1.375" ID x 2.5" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior Load Distribution - The 2.5" outer diameter provides excellent surface coverage, reducing stress and preventing surface damage under bolt heads
• Precision Fit for 1 1/4" Fasteners - 1.375" inner diameter ensures perfect alignment and secure installation with standard screw sizes
• Enhanced Durability - Made from high-quality steel construction for reliable performance in demanding industrial environments
• Industry Standard Compliance - Manufactured to ASME B18.21.1 specifications for guaranteed dimensional accuracy and mechanical properties
• Environmental Responsibility - Fully compliant with RoHS 3 and REACH regulations for safe use across global markets
• Optimal Thickness Range - 0.136-0.192" thickness provides the ideal balance between strength and flexibility for various applications
• SAE Standard Reliability - Built to SAE flat washer standards for consistent performance in mechanical and industrial assemblies

Professional Applications & Engineering Value

These SAE flat washers deliver exceptional engineering value in demanding industrial applications where reliable load distribution and surface protection are critical. The steel construction ensures superior strength and durability, making them ideal for heavy machinery, structural assemblies, and mechanical equipment requiring 1 1/4" screw sizes. The precise 1.375" ID x 2.5" OD dimensions prevent bolt loosening and distribute clamping force effectively, solving common issues of surface indentation and joint failure. Engineered to ASME B18.21.1 standards, these inch washers provide consistent performance in automotive, construction, and manufacturing applications where dimensional accuracy and reliable fastening solutions are paramount for operational safety and equipment longevity.

Specification Summary & Compliance

This SAE flat washer features precise dimensional specifications with 1.375" inner diameter, 2.5" outer diameter, and thickness ranging from 0.136" to 0.192", designed specifically for 1 1/4" screw applications. Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations (updated 06/14/2023, 235 SVHC), ensuring environmental responsibility and regulatory acceptance for industrial use across global markets.