S-98038A113 2" ID x 3.5" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Superior load distribution with a 3.5" outer diameter to prevent surface damage and extend joint life in heavy-duty assemblies.
• Exceptional durability from Rockwell C38 hardness, resisting deformation under high stress and repeated loading.
• Precise compatibility with 1 7/8" screw sizes, ensuring secure fit and reduced installation errors in inch-system applications.
• Reliable material quality using ASTM F436 Type 1 certified steel for consistent performance in structural and mechanical settings.
• Enhanced safety compliance with REACH regulations, ensuring safe use in industrial environments without hazardous substances.
• Optimized thickness range (0.178–0.280") provides flexibility for varying clamp load requirements while maintaining stability.
• Corrosion-resistant steel construction for long-term reliability in demanding conditions, minimizing maintenance needs.

Professional Applications & Engineering Value

This ASTM F436 Type 1 steel flat washer is engineered to address critical challenges in industrial fastening, such as uneven load distribution and joint failure. Its 2" ID and 3.5" OD design ensures that pressure is evenly spread across surfaces, reducing stress concentrations in heavy machinery, structural steel connections, and large-scale assemblies. Made from high-strength steel with Rockwell C38 hardness, it withstands intense vibrational forces and mechanical wear, making it ideal for construction, manufacturing, and infrastructure projects. The washer’s compliance with REACH standards further guarantees that it meets environmental and safety regulations, providing peace of mind for engineers and procurement specialists sourcing reliable inch-system washers for long-term performance.

Specification Summary & Compliance

This flat washer adheres to ASTM F436 Type 1 specifications, ensuring precise dimensional accuracy and mechanical properties for inch-based applications. It features an inner diameter of 2", outer diameter of 3.5", and thickness ranging from 0.178" to 0.280", designed to fit 1 7/8" screw sizes with reliable tolerance control. The washer is fully compliant with REACH (EC 1907/2006) regulations as of June 14, 2023, covering 235 SVHC, and meets industry standards for material integrity and environmental safety in industrial use.