S-91235A212 0.331" ID x 0.709" OD Heavy-Vibration-Resistant Spring Lock Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 17-7 PH Stainless Steel construction, ideal for harsh industrial environments and outdoor applications.
• Exceptional spring tension and locking force prevents loosening under vibration, maintaining secure fastening in dynamic assemblies.
• High hardness (Rockwell C38) ensures excellent wear resistance and long-term durability, reducing replacement frequency.
• Precise dimensional fit with 0.331" ID and 0.709" OD designed for 5/16" screws, ensuring easy installation and reliable performance.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and unrestricted use in global markets.
• Optimized thickness and overall height (0.074-0.082" and 0.102") provides consistent compression and space-efficient design.
• Ideal for inch-system applications, offering seamless integration with standard 5/16" screw assemblies without conversion needs.

Professional Applications & Engineering Value

This 17-7 PH Stainless Steel spring lock washer delivers critical engineering value by addressing common industrial challenges such as vibration-induced loosening and corrosive degradation. Its high-strength, precipitation-hardened stainless steel material ensures reliable performance in demanding sectors like automotive, aerospace, and heavy machinery, where fastener failure is not an option. The spring lock design maintains constant tension, effectively resisting rotational forces and thermal cycling. With a precise 0.331" inner diameter tailored for 5/16" screw size, it eliminates play and misalignment, streamlining assembly processes. The corrosion-resistant properties make it suitable for marine, chemical, and outdoor equipment, reducing maintenance costs and enhancing operational lifespan in aggressive environments.

Specification Summary & Compliance

This washer features an ID of 0.331", OD of 0.709", thickness range of 0.074-0.082", and overall height of 0.102", manufactured to precise inch-system tolerances for consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use. The material 17-7 PH Stainless Steel with Rockwell C38 hardness meets rigorous standards for mechanical strength and environmental resistance, supporting applications requiring dependable locking and corrosion protection.