S-90183A216 0.197" ID x 0.5" OD Washers for Blind Rivets

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in humid or demanding industrial environments
• Precise dimensional fit with 0.197" ID and 0.5" OD, ensuring secure seating and even load distribution for 3/16" rivets
• Enhanced load-bearing surface with 0.057-0.067" thickness, reducing surface pressure and preventing material damage
• Reliable environmental compliance meeting RoHS 3 and REACH standards, safe for regulated industries and global supply chains
• Durable steel core providing consistent mechanical strength and vibration resistance in assembled applications
• Broad industrial compatibility with inch measurement system, suitable for North American machinery and equipment specifications

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical protection against galvanic corrosion and environmental degradation in industrial fastening systems. The 0.197" ID provides precise alignment with 3/16" rivets, preventing installation misalignment while the 0.5" OD creates optimal bearing surface area to distribute clamping forces evenly. This combination addresses common failure points in vibration-prone assemblies by maintaining joint integrity and preventing surface indentation. The zinc plating acts as a sacrificial layer, significantly extending service life in manufacturing facilities, outdoor equipment, and automotive applications where moisture exposure is a concern.

Specification Summary & Compliance

Manufactured to standard inch dimensions with 0.197" inner diameter and 0.5" outer diameter, featuring a controlled thickness range of 0.057-0.067" for consistent performance. These flat washers comply with RoHS 3 (2015/863/EU) under exemption 6(a)-I for lead as an alloying element in steel and meet REACH (EC 1907/2006) standards as of January 17, 2023, ensuring regulatory compliance for industrial distribution and use.