S-99041A202 0.125" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc-plated steel construction for extended service life in harsh environments
• Optimal load distribution with 0.75" square design that prevents fastener embedment and surface damage
• Precision compatibility with No. 4 screws thanks to 0.125" inner diameter for secure, vibration-resistant assemblies
• Enhanced mechanical strength with Rockwell B40 hardness rating that maintains structural integrity under pressure
• Consistent performance ensured by controlled thickness range (0.042-0.051") for uniform clamping force
• Global compliance assurance meeting RoHS 3 and REACH regulations for international project suitability
• Dimensional reliability manufactured to inch system specifications for seamless integration with standard components

Professional Applications & Engineering Value

This zinc-plated steel square washer delivers critical engineering advantages in industrial fastening systems where standard round washers prove insufficient. The square configuration provides superior anti-rotation properties and increased surface contact area, effectively solving common issues of fastener loosening under vibration and thermal cycling. The Rockwell B40 hardness ensures the washer maintains its form under heavy clamp loads without deformation, while the zinc plating creates a sacrificial layer that protects both the washer and mating surfaces from galvanic corrosion. Particularly valuable in electrical enclosures, machinery frames, and structural assemblies using No. 4 screws, this component extends equipment service life by preventing stress concentration and material fatigue at fastener points.

Specification Summary & Compliance

Manufactured to inch system dimensional standards with 0.125" inner diameter and 0.75" width. Thickness maintained between 0.042-0.051" for consistent performance. Hardness certified to Rockwell B40 specifications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates as of June 2023, ensuring environmental responsibility and workplace safety.