S-90377A115 0.156" ID x 0.562" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to Black-Oxide 18-8 Stainless Steel, ideal for harsh or humid industrial environments.
• Enhanced load distribution with a 0.562" OD and 0.156" ID, preventing surface damage and maintaining joint integrity.
• Exceptional durability from Rockwell B68 hardness, ensuring long-term performance under mechanical stress.
• Precise fit for No. 6 screws, reducing installation errors and improving assembly efficiency.
• Reliable thickness tolerance (0.040-0.060") for consistent spacing and vibration resistance in critical applications.
• Compliance with global safety standards including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Versatile inch system compatibility, making it easy to integrate into existing US-standard machinery and equipment.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat washer is engineered to address common industrial challenges like corrosion, galvanic reactions, and fastener loosening. The black-oxide surface treatment provides an extra layer of protection against oxidation and chemical exposure, extending service life in demanding settings such as marine, automotive, and outdoor equipment. With precise dimensions (0.156" ID and 0.562" OD), it ensures optimal load distribution for No. 6 screw sizes, reducing the risk of material fatigue and joint failure. Its Rockwell B68 hardness and consistent thickness (0.040-0.060") make it a reliable choice for high-vibration applications, offering engineers a durable, compliant component that meets strict industrial safety standards.

Specification Summary & Compliance

This flat washer adheres to inch system measurements with an inner diameter of 0.156", outer diameter of 0.562", and thickness ranging from 0.040" to 0.060". It is manufactured from 18-8 Stainless Steel with a black-oxide finish and hardness of Rockwell B68 for consistent performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial applications.