S-91117A204 0.219" ID x 1" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection through zinc plating extends service life in demanding environments
• Optimal load distribution with 1" outer diameter prevents surface damage and joint loosening
• Precise No. 10 screw compatibility with 0.219" inner diameter ensures secure fastening alignment
• Enhanced mechanical strength from Rockwell B40 hardness maintains shape under heavy loads
• Consistent performance guaranteed by controlled thickness range of 0.235-0.265"
• Regulatory compliance assurance meets RoHS 3 and REACH standards for global industrial use
• Durable steel construction provides reliable, long-lasting performance in mechanical assemblies

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical engineering solutions for industrial equipment, machinery assembly, and structural applications. The combination of Rockwell B40 hardness and precise dimensional control (0.219" ID × 1" OD) ensures optimal load distribution, preventing surface indentation and maintaining bolt tension in high-vibration environments. The zinc plating surface treatment provides essential corrosion resistance, extending component life in humid or chemically aggressive settings. For No. 10 screw installations, these inch-system washers eliminate galvanic corrosion concerns while meeting strict industry compliance requirements, making them ideal for OEM manufacturing, maintenance operations, and heavy-duty mechanical systems where reliability is paramount.

Specification Summary & Compliance

Manufactured to inch measurement standards with precise inner diameter (0.219"), outer diameter (1"), and thickness range (0.235-0.265") specifications. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations (updated 01/17/2023, 233 SVHC). The Rockwell B40 hardness rating ensures consistent mechanical properties and dimensional stability across production batches for reliable performance in industrial fastening applications.