S-91812A252 0.17" ID x 0.3" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual-sided serrations that bite into mating surfaces, preventing fastener loosening under dynamic loads
• Exceptional corrosion resistance with Black Oxide 316 Stainless Steel construction, ideal for harsh industrial environments and chemical exposure
• Enhanced durability and wear resistance from case hardening treatment achieving Rockwell C46 hardness for extended service life
• Universal compatibility with both inch (No. 8) and metric (M4) screw sizes, simplifying inventory management
• Reliable locking performance through wedge-action design that maintains constant tension and prevents rotation
• Compliance assurance with RoHS 3 and REACH regulations, meeting international environmental and safety standards
• Precision engineering with consistent 0.17" ID and 0.3" OD dimensions ensuring proper fit and optimal clamping force distribution

Professional Applications & Engineering Value

These wedge lock washers deliver critical vibration resistance in demanding applications where fastener security is paramount. The Black Oxide 316 Stainless Steel construction provides superior corrosion resistance for marine, chemical processing, and outdoor equipment applications. The top and bottom serrations create multiple biting surfaces that dig into both the fastener and base material, creating a mechanical lock that withstands extreme vibration and thermal cycling. The case hardened treatment to Rockwell C46 ensures the serrations maintain their sharpness through repeated use, while the wedge-lock action maintains constant spring tension that compensates for material relaxation. This combination of features solves common industrial challenges including fastener loosening in vibrating machinery, corrosion-induced failure in harsh environments, and the need for reliable locking in safety-critical assemblies.

Specification Summary & Compliance

Precision-engineered with 0.17" inner diameter and 0.3" outer diameter dimensions, these wedge lock washers maintain tight tolerances for consistent performance. The top and bottom serration pattern ensures reliable locking action across various surface conditions. Manufactured from Black Oxide 316 Stainless Steel and heat treated to achieve Rockwell C46 hardness, these washers comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they're free from restricted substances and suitable for global industrial applications requiring environmental compliance.