S-98370A029 0.344" ID x 0.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh or humid environments.
• Enhanced load distribution with precise 0.344" ID and 0.75" OD, reducing surface pressure and preventing material damage.
• Exceptional mechanical strength backed by Rockwell B83 hardness, ensuring long-term reliability under stress.
• Accurate fit for 5/16" screws in inch system applications, minimizing installation errors and improving assembly efficiency.
• Consistent dimensional stability with thickness ranging from 0.105" to 0.130", providing reliable performance in varied setups.
• Compliance with global safety standards including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Durable, low-maintenance performance thanks to the material's innate resistance to rust and wear.

Professional Applications & Engineering Value

These 18-8 stainless steel flat washers deliver critical engineering value by addressing common industrial challenges such as fastener loosening, surface abrasion, and corrosion-induced failure. The inch system design, with a 5/16" screw size compatibility, ensures seamless integration into machinery, automotive assemblies, and structural frameworks where precise flat washer dimensions are non-negotiable. The stainless steel material inherently resists oxidation and chemical exposure, making these washers a dependable choice for outdoor, marine, or chemical processing applications. By maintaining corrosion resistance and structural integrity, they extend equipment lifespan and reduce maintenance frequency, offering a cost-effective solution for heavy-duty and precision-focused environments.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances, with an inner diameter of 0.344", outer diameter of 0.75", and thickness between 0.105" and 0.130". It is manufactured to fit 5/16" screw sizes and achieves a Rockwell B83 hardness for consistent mechanical performance. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in industries requiring strict environmental and safety standards.