S-90377A119 0.172" ID x 0.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh or outdoor environments
• Enhanced load distribution with precise 0.172" ID and 0.75" OD, preventing surface damage and loosening
• Consistent performance under stress thanks to Rockwell B68 hardness, maintaining shape and function
• Reliable fit for No. 8 screws, ensuring secure fastening and reducing assembly time
• Durable, long-lasting surface protection with black-oxide finish, resisting wear and abrasion
• Compliance with strict environmental regulations including RoHS 3 and REACH, for safe global use
• Versatile thickness range (0.030-0.050") to accommodate slight variations and ensure proper clamping force

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat washer is engineered to address common industrial challenges such as galvanic corrosion, vibration-induced loosening, and material degradation in demanding settings. The stainless steel construction combined with a black-oxide surface treatment provides excellent resistance to moisture, chemicals, and UV exposure, making it suitable for outdoor equipment, marine applications, and chemical processing machinery. Its precise inner and outer diameters (0.172" ID x 0.75" OD) ensure optimal load distribution, protecting components from stress concentration and extending the life of No. 8 screw assemblies. By maintaining dimensional stability and Rockwell B68 hardness, this washer delivers consistent performance in high-stress environments, reducing maintenance needs and downtime for industrial operations.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances, with an inner diameter of 0.172", outer diameter of 0.75", and thickness ranging from 0.030" to 0.050". It is manufactured from 18-8 Stainless Steel with a black-oxide finish and a hardness of Rockwell B68. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use worldwide.