S-96505A128 28 mm ID x 42 mm OD DIN 1440, ISO 8738 Oversized Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution with 42mm outer diameter to prevent surface damage and maintain joint integrity under high-pressure conditions
• Precision Fit for M28 Fasteners featuring 28mm inner diameter ensuring perfect compatibility with standard metric screw sizes
• Superior Durability achieved through Rockwell B76 hardness steel construction resisting deformation in demanding applications
• Regulatory Compliance Assurance meeting DIN 1440 and ISO 8738 specifications for guaranteed dimensional accuracy and performance
• Environmental Responsibility with full RoHS 3 and REACH compliance for safe use across regulated industries
• Optimized Thickness Range (4.4-5.6mm) providing ideal balance between spacing requirements and structural stability
• Industrial-Grade Material Selection using high-quality steel for consistent performance in corrosive and high-vibration environments

Professional Applications & Engineering Value

These M28 metric flat washers deliver critical engineering solutions where precise load distribution and surface protection are paramount. Manufactured from hardened steel with Rockwell B76 rating, they effectively prevent fastener loosening in high-vibration machinery while protecting sensitive surfaces from galling and indentation. The DIN 1440 and ISO 8738 certification ensures dimensional consistency across batch productions, making them ideal for assembly lines requiring interchangeable components. Particularly valuable in heavy equipment manufacturing, structural steel connections, and industrial machinery where metric fastening systems demand washers that maintain clamp load under dynamic stresses. The generous 42mm OD creates an expanded bearing surface that significantly reduces point loading, extending both fastener and substrate service life in demanding applications.

Specification Summary & Compliance

Manufactured to exacting DIN 1440 and ISO 8738 standards with dimensional specifications including 28mm inner diameter, 42mm outer diameter, and 4.4-5.6mm thickness range. Material hardness certified at Rockwell B76 for consistent mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC requirements as of January 2023. These metric steel flat washers maintain Class A tolerance levels per ISO standards for precision fit with M28 fasteners in industrial applications.