S-91100A344 4.4 mm ID x 11.7 mm OD DIN 7349 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 accuracy with 4.4mm ID and 11.7mm OD ensuring perfect fit for M4 fasteners
• Enhanced load distribution across surfaces when used with Class 8.8 strength fasteners
• Industry-standard compliance with DIN 7349 specifications for guaranteed interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance for global supply chain compatibility
• Optimized thickness range (1.4-1.8mm) providing reliable spacing and vibration resistance
• Cost-effective protection for mating surfaces against galling and embedment

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical engineering solutions where surface protection and fastener performance are paramount. The M4 metric sizing combined with DIN 7349 standardization ensures perfect compatibility with Class 8.8 fasteners in automotive assemblies, machinery frames, and electrical enclosures. The zinc plating creates a sacrificial barrier that significantly extends component life in humid or chemically aggressive environments, while the precise dimensional tolerances prevent loosening under vibration. This combination of corrosion resistance and mechanical reliability makes these washers ideal for OEM manufacturing and maintenance applications requiring long-term operational integrity.

Specification Summary & Compliance

Manufactured to DIN 7349 standards with inner diameter of 4.4mm, outer diameter of 11.7mm, and thickness range of 1.4-1.8mm. Designed specifically for use with M4 screws and Class 8.8 fastener strength grade. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across industrial sectors.