S-92538A508 5.3 mm ID x 22 mm OD Finishing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Precise flush seating due to the 100° countersink angle, ensuring smooth surfaces and reduced snagging in assemblies.
• Enhanced load distribution from the 22mm OD and 3.2-3.8mm thickness, minimizing surface damage and improving joint integrity.
• Reliable hardness performance with Rockwell B83 rating, offering excellent durability and resistance to deformation under stress.
• Accurate fit for M5 screws with a 5.3mm ID, providing secure fastening and reducing the risk of loosening.
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global industrial and consumer applications.
• Metric system compatibility for seamless integration into international engineering designs and replacement parts.

Professional Applications & Engineering Value

This M5 metric countersunk washer is engineered to address common industrial challenges like corrosion, vibration loosening, and surface marring. Made from 18-8 stainless steel, it provides exceptional resistance to rust and chemicals, making it suitable for demanding sectors such as marine, automotive, and food processing equipment. The 100° countersink angle ensures a flush fit with corresponding fasteners, eliminating protrusions that could compromise safety or aesthetics. With a Rockwell B83 hardness, it maintains structural integrity under repetitive loads, while the precise metric dimensions (5.3mm ID, 22mm OD) guarantee consistent performance in M5 screw applications. Ideal for assemblies requiring smooth finishes and reliable fastening, this washer enhances longevity and reduces maintenance costs in corrosive or high-stress environments.

Specification Summary & Compliance

This washer adheres to standard metric measurements with an inner diameter of 5.3 mm, outer diameter of 22 mm, and thickness ranging from 3.2–3.8 mm, ensuring precise fit for M5 screw sizes. It meets general industrial tolerances for flat washers and is manufactured from 18-8 stainless steel with a hardness of Rockwell B83. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for various applications.