S-98038A312 2.125" ID x 3.75" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Exceptional Load Distribution with a large 3.75" OD and 2.125" ID, minimizing surface pressure and preventing joint failure in heavy-duty assemblies.
• Superior Durability & Hardness from Rockwell C38 steel, ensuring the washer maintains its shape and function under high stress and repeated loading.
• Reliable ASTM F436 Type 1 Compliance guarantees consistent mechanical properties and performance in structural and industrial applications.
• Enhanced Corrosion Resistance due to the high-quality steel material, extending service life in harsh environmental conditions.
• Precision Fit for 2" Screws with exact inner diameter, ensuring easy installation and secure fastening without slippage.
• RoHS 3 & REACH Compliance ensures environmental safety and regulatory adherence, making it suitable for global industrial supply chains.
• Versatile Industrial Use with a thickness range of 0.178-0.280", accommodating various torque and gap requirements in machinery and construction.

Professional Applications & Engineering Value

This ASTM F436 Type 1 certified steel flat washer is engineered to address critical challenges in industrial fastening systems, such as uneven load distribution and bolt loosening under vibration. The high-strength steel construction, combined with precise dimensions (2.125" ID and 3.75" OD), ensures optimal force spreading across connected surfaces, reducing the risk of material fatigue and joint failure. Its Rockwell C38 hardness provides resilience in demanding environments like heavy machinery, structural steel connections, and infrastructure projects, where reliability is paramount. Additionally, the washer's compliance with RoHS 3 and REACH standards makes it a safe choice for industries prioritizing environmental regulations without compromising on load-bearing performance or longevity.

Specification Summary & Compliance

This flat washer adheres to ASTM F436 Type 1 specifications, ensuring consistent quality and mechanical properties for structural applications. It features an inner diameter of 2.125", outer diameter of 3.75", and thickness ranging from 0.178" to 0.280", designed for use with 2" screw sizes in inch measurement systems. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial use with no hazardous substances.