S-92140A116 0.344" ID x 1.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with black-oxide steel finish for extended service life in harsh environments
• Precise dimensional stability with 0.344" ID and 1.25" OD ensuring perfect fit for 5/16" fasteners
• Consistent load distribution thanks to uniform 0.120-0.130" thickness across the entire washer surface
• Heavy-duty performance in inch-system applications requiring reliable mechanical spacing and vibration resistance
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe industrial usage
• Optimized surface protection that maintains integrity while preventing galling and seizing

Professional Applications & Engineering Value

This black-oxide steel flat washer delivers exceptional engineering value through its specialized surface treatment and precise dimensional control. The black-oxide coating provides superior corrosion resistance compared to plain steel, making it ideal for industrial applications exposed to moisture, chemicals, or outdoor elements. With its specific 0.344" inner diameter engineered for 5/16" fasteners and substantial 1.25" outer diameter, this flat washer effectively distributes clamping force over a wider area, preventing surface damage and maintaining joint integrity. The consistent 0.120-0.130" thickness ensures reliable performance in heavy-duty assemblies where vibration resistance and load distribution are critical, from machinery manufacturing to structural steel connections.

Specification Summary & Compliance

This flat washer features inch-system dimensions with 0.344" inner diameter, 1.25" outer diameter, and controlled thickness between 0.120-0.130". Manufactured from black-oxide steel, the washer provides enhanced surface protection while maintaining full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The product is specifically engineered for use with 5/16" screw sizes and is suitable for various industrial and mechanical applications requiring reliable fastening solutions.