S-90377A122 0.188" ID x 1" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments and extending service life.
• Enhanced load distribution due to precise 0.188" ID and 1" OD dimensions, minimizing surface damage and loosening under vibration.
• Consistent performance with Rockwell B68 hardness, providing reliable durability and resistance to deformation in demanding applications.
• Versatile fit and spacing with a 0.030-0.070" thickness range, accommodating various assembly requirements for No. 8 screw sizes.
• Environmental compliance assurance meeting RoHS 3 and REACH standards, ensuring safe use in regulated industrial sectors.
• Broad industrial applicability as a flat washer designed for heavy-duty use, offering long-term reliability and reduced maintenance needs.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat washer delivers critical engineering value by addressing common industrial challenges such as corrosion, vibration-induced failure, and material fatigue. The Black-Oxide surface treatment enhances corrosion resistance, making it suitable for outdoor, marine, and chemical-exposed settings where moisture and contaminants are prevalent. Its precise 0.188" ID and 1" OD ensure optimal alignment and load distribution for No. 8 screw applications, preventing joint loosening and extending the lifespan of assembled components. Engineered with Rockwell B68 hardness, it maintains structural integrity under stress, reducing the risk of washer failure in machinery, automotive, and construction assemblies. This combination of material properties and dimensional accuracy supports efficient, low-maintenance operations in industrial washers and precision equipment.

Specification Summary & Compliance

This flat washer adheres to inch system measurements with an inner diameter of 0.188", outer diameter of 1", and thickness ranging from 0.030" to 0.070", ensuring precise fit for No. 8 screw sizes. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications. The material, 18-8 Stainless Steel with a Black-Oxide finish, and hardness of Rockwell B68 provide consistent performance and durability in accordance with standard industrial requirements.