S-98370A019 0.406" ID x 0.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemically aggressive environments.
• Exceptional load distribution with a 0.75" outer diameter, protecting surfaces and preventing fastener embedment.
• Precise fit and secure fastening ensured by the 0.406" inner diameter, perfectly matching 3/8" screws.
• Consistent performance and durability backed by a Rockwell B83 hardness rating for reliable, long-term use.
• Guaranteed material safety with full compliance to RoHS 3 and REACH environmental regulations.
• Versatile application range due to the standardized inch system and flat profile for broad industrial use.
• Optimized thickness tolerance (0.079-0.098") ensures uniform pressure and stability in assembled joints.

Professional Applications & Engineering Value

These 18-8 stainless steel flat washers are engineered to solve critical challenges in industrial assembly, such as galvanic corrosion, surface damage, and joint failure. The corrosion-resistant material ensures longevity in demanding applications like marine equipment, food processing machinery, and outdoor structures, where exposure to moisture and chemicals is common. The precise 0.406" ID and 0.75" OD provide excellent load distribution, reducing stress concentrations and preventing loosening under vibration. With a Rockwell B83 hardness, these washers maintain structural integrity, making them a reliable choice for high-performance fastening in construction, automotive, and heavy machinery. Their compliance with RoHS and REACH standards further supports safe, sustainable manufacturing processes.

Specification Summary & Compliance

This 3/8" flat washer adheres to inch system standards with an inner diameter of 0.406", outer diameter of 0.75", and thickness ranging from 0.079" to 0.098". Manufactured from 18-8 stainless steel with a hardness of Rockwell B83, it ensures dimensional accuracy and mechanical reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial safety and environmental requirements.