S-98038A112 1.77" ID x 3.25" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Superior load distribution with a large 3.25" outer diameter, reducing surface pressure and preventing joint failure in heavy-duty assemblies.
• Exceptional durability from Rockwell C38 hardness steel, resisting deformation under high stress and extending service life.
• Precise fit and alignment with a 1.77" inner diameter designed specifically for 1 5/8" screws, ensuring secure fastening and ease of installation.
• Reliable performance in harsh environments due to compliant steel material that offers inherent corrosion resistance.
• Industry-standard compliance with ASTM F436 Type 1 specifications, guaranteeing consistent quality and mechanical properties for structural applications.
• Environmental and safety assurance through REACH compliance, making it suitable for regulated industrial and international markets.
• Versatile thickness range from 0.178" to 0.280", accommodating slight variations in assembly requirements without compromising performance.

Professional Applications & Engineering Value

This ASTM F436 Type 1 steel flat washer is engineered to address critical challenges in heavy-duty industrial applications, such as structural steel connections, machinery assembly, and construction projects. Its robust Rockwell C38 hardness ensures it maintains integrity under substantial loads, preventing bolt loosening and material fatigue. The precise 1.77" ID and 3.25" OD dimensions optimize load distribution, reducing stress concentrations on fastened surfaces—a common pain point in dynamic or vibrating environments. Made from high-strength steel and compliant with stringent standards, this washer delivers reliable corrosion resistance and long-term performance, making it ideal for industrial washers used in demanding sectors like infrastructure and manufacturing.

Specification Summary & Compliance

This flat washer adheres to precise dimensional tolerances with an inner diameter of 1.77", outer diameter of 3.25", and thickness ranging from 0.178" to 0.280", designed for use with 1 5/8" screw sizes. It meets ASTM F436 Type 1 specifications for mechanical properties and hardness, ensuring consistent performance in structural applications. The product is REACH (EC 1907/2006) compliant as of June 14, 2023, confirming it is free from 235 Substances of Very High Concern (SVHC), and is manufactured from high-quality steel for reliable industrial use.