S-91860A053 4.3 mm ID x 9 mm OD DIN 125 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 17-7 PH Stainless Steel material, ideal for harsh environments and extending service life.
• Excellent mechanical strength and durability provided by Rockwell C40 hardness, preventing deformation under load.
• Precise dimensional fit with 4.3mm ID and 9mm OD, ensuring reliable performance with M4 screws and reducing assembly issues.
• Guaranteed interchangeability and quality through strict adherence to DIN 125 standards for consistent flat washer geometry.
• Enhanced safety and reliability with controlled thickness (0.7-0.9 mm) for optimal load distribution and vibration resistance.
• Compliance with global environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Broad industrial compatibility as a metric system component, suitable for global machinery and equipment specifications.

Professional Applications & Engineering Value

This M4 flat washer made from 17-7 PH Stainless Steel addresses critical engineering challenges in demanding sectors like aerospace, automotive, and chemical processing. Its high-strength Rockwell C40 hardness ensures it maintains clamp load and resists wear in high-vibration assemblies, preventing joint failure. The corrosion-resistant properties protect against harsh chemicals and moisture, significantly reducing maintenance needs and downtime. Precision-engineered to DIN 125 specifications with a 4.3mm ID and 9mm OD, it provides a perfect fit for M4 hardware, eliminating misalignment and ensuring even pressure distribution. This makes it an essential component for industrial washers applications where reliability and longevity are paramount.

Specification Summary & Compliance

This flat washer features precise metric dimensions: 4.3mm Inner Diameter, 9mm Outer Diameter, and 0.7-0.9mm Thickness, manufactured to DIN 125 standards for dimensional accuracy and performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety requirements for industrial use.