S-90377A117 0.156" ID x 0.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coated 18-8 stainless steel construction for extended service life in harsh environments
• Enhanced load distribution through precise 0.156" ID and 0.75" OD dimensions, preventing surface damage and maintaining joint integrity
• Exceptional durability with Rockwell B68 hardness rating, resisting deformation under heavy loads and repeated use
• Perfect compatibility with No. 6 screw sizes, ensuring secure fastening and vibration resistance in assemblies
• Reliable performance across temperature variations thanks to stainless steel's thermal stability and consistent 0.030-0.070" thickness
• Environmental compliance with RoHS 3 and REACH regulations, making them safe for industrial applications worldwide
• Versatile application in inch-based systems, providing precise fit and corrosion protection for machinery and equipment

Professional Applications & Engineering Value

These black-oxide 18-8 stainless steel flat washers deliver critical engineering solutions where corrosion resistance and mechanical reliability are paramount. The black-oxide surface treatment enhances both corrosion protection and aesthetic appeal while maintaining dimensional stability. Engineered for No. 6 screw sizes with precise inner and outer diameters (0.156" ID x 0.75" OD), they effectively distribute clamping forces across wider surfaces, preventing material fatigue and joint loosening in vibrating environments. The Rockwell B68 hardness ensures consistent performance in heavy-duty applications including industrial machinery, marine equipment, and outdoor structures where moisture and chemicals pose constant threats to fastener integrity.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with 0.156" inner diameter and 0.75" outer diameter, these flat washers maintain precise thickness tolerances (0.030-0.070") for reliable performance. Constructed from 18-8 stainless steel with black-oxide coating for enhanced corrosion protection. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability. The hardness rating of Rockwell B68 guarantees mechanical durability across various loading conditions.