S-93925A418 3.7 mm ID x 7 mm OD DIN 6797 Internal-Tooth Lock Washers
Internal-Tooth Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with internal teeth that bite into mating surfaces, preventing loosening under dynamic loads.
- Enhanced durability and corrosion protection from the zinc-plated steel construction, extending service life in harsh environments.
- Consistent, reliable locking performance ensured by the precise Rockwell C42 hardness, maintaining tooth spring action.
- Guaranteed dimensional accuracy and interchangeability through strict adherence to the DIN 6797 standard.
- Secure fit for M3.5 screws with a precise 3.7mm internal diameter, providing optimal grip and alignment.
- Safe for use in regulated industries with full compliance to RoHS 3 and REACH environmental directives.
- Space-efficient design with a compact 7mm outer diameter and 0.4-0.6mm thickness for applications with limited clearance.
Professional Applications & Engineering Value
This M3.5 internal tooth lock washer is engineered to solve critical fastening challenges in high-vibration and precision assembly environments. The zinc-plated steel material offers excellent strength and corrosion resistance, making it ideal for automotive, machinery, and electronic enclosures where secure, long-term fastening is non-negotiable. The internal tooth design concentrates locking force directly under the screw head, effectively resisting rotational loosening caused by operational stresses and thermal cycling. By conforming to the DIN 6797 specification, it delivers predictable performance and seamless integration into metric-based industrial designs, reducing maintenance needs and assembly failures.
Specification Summary & Compliance
This washer meets the dimensional and performance criteria of the DIN 6797 standard. Key specifications include an Internal Diameter (ID) of 3.7 mm for M3.5 screw size, an Outer Diameter (OD) of 7 mm, and a Thickness of 0.4-0.6 mm. The material hardness is Rockwell C42. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.
