S-90339A034 Easy-Install Slotted Washers

Key Features & Benefits at a Glance

• Enhanced Durability: Black-oxide steel construction provides superior corrosion resistance, extending service life in demanding industrial environments.
• Precise Fit & Secure Fastening: Designed for 5/16" and 3/8" screws with accurate slot dimensions (13/32" width, 3/4" depth) ensuring reliable installation and vibration resistance.
• Optimal Load Distribution: Large 1.25" outer diameter and consistent 0.375" thickness help distribute pressure evenly, protecting surfaces and preventing loosening.
• High Mechanical Strength: Rockwell 15N80 hardness rating guarantees the washer maintains its shape and function under high stress and repeated use.
• Regulatory Compliance Assurance: Meets RoHS 3 and REACH standards, ensuring safety and environmental responsibility for global supply chains.
• Versatile Inch System Compatibility: Manufactured to inch measurement standards, facilitating easy integration with existing North American machinery and components.
• Reliable Performance in Harsh Conditions: The slotted design and robust material make it ideal for applications requiring frequent adjustments and exposure to elements.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial use, this slotted washer in black-oxide steel addresses critical engineering challenges such as component wear and fastener failure. Its precise slot width and depth allow for secure engagement with 5/16" and 3/8" screws, minimizing play and enhancing assembly integrity in machinery, construction, and automotive systems. The Rockwell 15N80 hardness ensures the washer withstands high loads without deformation, while the black-oxide surface treatment offers added corrosion resistance, reducing maintenance needs in humid or abrasive settings. Ideal for applications requiring reliable, adjustable fastening, this washer delivers consistent performance, supporting long-term operational efficiency and reducing downtime in professional environments.

Specification Summary & Compliance

This washer features an OD of 1.25", thickness range of 0.365-0.385", slot width of 13/32", and slot depth of 3/4", compatible with 5/16" and 3/8" screw sizes. It adheres to inch system measurement standards and is manufactured with a hardness of Rockwell 15N80 for dimensional stability. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) as of January 17, 2023, meeting essential health and environmental regulations for industrial components.