S-91100A312 9 mm ID x 28 mm OD DIN 440-R Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Precise dimensional fit with 9mm ID specifically engineered for M8 screws, ensuring secure fastening without play
• Optimized load distribution with 28mm OD design that minimizes surface pressure and prevents material damage
• Guaranteed dimensional consistency through strict adherence to DIN 440-R manufacturing standards
• Enhanced environmental compliance meeting both RoHS 3 and REACH regulations for safe industrial use
• Reliable thickness range of 2.4-3.6 mm providing consistent spacing and vibration resistance
• Broad industrial compatibility with metric fastening systems for versatile application across multiple sectors

Professional Applications & Engineering Value

This M8 metric flat washer delivers critical engineering solutions through its zinc-plated steel construction and DIN 440-R compliant design. The combination of precise 9mm inner diameter and 28mm outer diameter ensures optimal load distribution across joint surfaces, effectively preventing bolt head embedment and surface damage in industrial applications. The zinc plating provides essential corrosion protection, extending component life in environments exposed to moisture or chemicals. Engineered to maintain clamping force under vibration, these flat washers solve common fastening failures in machinery assembly, structural frameworks, and equipment manufacturing. Their standardized dimensions guarantee interchangeability and simplify inventory management for maintenance operations.

Specification Summary & Compliance

This washer features precise metric dimensions with 9mm inner diameter, 28mm outer diameter, and thickness ranging 2.4-3.6 mm, manufactured to DIN 440-R standards for dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. Designed specifically for M8 screw applications, this zinc-plated steel washer meets rigorous manufacturing specifications for reliable performance in professional fastening systems.