S-91525A313 0.109" ID x 0.312" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel composition, ideal for harsh chemical and marine environments
• Enhanced load distribution with precise 0.312" OD and 0.109" ID dimensions, preventing surface damage to assemblies
• Consistent mechanical performance ensured by Rockwell B68 hardness, maintaining shape under pressure
• Reliable fit for No. 3 screws in inch-system applications, reducing installation errors
• Durable service life with thickness tolerance (0.050-0.080"), accommodating minor surface variations
• Environmental and workplace safety through full RoHS 3 and REACH compliance
• Versatile industrial use in plumbing, chemical processing, and outdoor equipment due to material integrity

Professional Applications & Engineering Value

These 316 stainless steel flat washers address critical challenges in corrosive and high-moisture settings, where standard fasteners fail prematurely. The molybdenum-enhanced alloy provides exceptional resistance to chlorides and acids, making them suitable for chemical processing equipment, marine hardware, and food-grade machinery. With a Rockwell B68 hardness rating, they maintain structural integrity under vibration and load, preventing deformation that could compromise seal integrity. The precise inch-system dimensions (0.312" OD, 0.109" ID) ensure perfect alignment with No. 3 screws, reducing assembly time and minimizing galling. This combination of material durability and dimensional accuracy extends maintenance cycles and lowers total cost of ownership in demanding B2B applications.

Specification Summary & Compliance

Manufactured to standard inch-system tolerances with an inner diameter of 0.109", outer diameter of 0.312", and thickness range of 0.050-0.080" for compatibility with No. 3 screw sizes. The 316 stainless steel construction meets industry standards for corrosion resistance, complemented by a Rockwell B68 hardness specification for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures adherence to environmental and safety protocols, with no restricted substances above threshold limits.