S-98269A123 4.3 mm ID x 8 mm OD DIN 433 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black Oxide 18-8 Stainless Steel, ideal for harsh industrial environments.
• Precise dimensional accuracy with 4.3mm ID and 8mm OD, ensuring reliable fit and load distribution for M4 screws.
• Enhanced durability from Rockwell B75 hardness, providing long-term performance under mechanical stress.
• Compliance with DIN 433 standards guarantees consistent quality and interchangeability in metric applications.
• Environmental safety assurance through RoHS 3 and REACH compliance, meeting strict regulatory requirements.
• Optimal thickness control (0.5-0.6mm) for effective spacing and vibration resistance in assemblies.
• Versatile industrial use in machinery, automotive, and electronics due to robust material and design.

Professional Applications & Engineering Value

This M4 metric flat washer is engineered to address common industrial challenges such as fastener loosening, corrosion-induced failures, and inconsistent load distribution. Made from Black Oxide 18-8 Stainless Steel, it offers excellent resistance to rust and oxidation, extending service life in humid or chemically aggressive settings. The precise 4.3mm internal diameter and 8mm outer diameter ensure a snug fit on M4 screws, preventing misalignment and reducing wear. Ideal for applications in automotive assemblies, electronic enclosures, and heavy machinery, this washer's DIN 433 compliance and fine-tuned thickness provide reliable performance, minimizing maintenance needs and downtime in demanding industrial washers scenarios.

Specification Summary & Compliance

This flat washer adheres to DIN 433 standards for dimensional precision, with an ID of 4.3 mm, OD of 8 mm, and thickness of 0.5-0.6 mm. It is manufactured from 18-8 Stainless Steel with a Black Oxide finish and Rockwell B75 hardness for consistent quality. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental and safety regulations, ensuring suitability for global industrial supply chains.