S-90069A212 0.14" ID x 0.289" OD ASME B18.21.1 Countersunk External-Tooth Lock Washers
Countersunk External-Tooth Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Geometric Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through external teeth that bite into mating surfaces, preventing loosening under dynamic loads
- Enhanced corrosion protection with black oxide steel finish, extending service life in demanding industrial environments
- Precision flush mounting with 82° countersink angle ensuring smooth surface alignment and professional appearance
- Optimized dimensional accuracy with 0.14" ID and 0.289" OD specifically engineered for No. 6 screw applications
- Exceptional durability from Rockwell C40 hardness rating, maintaining tooth integrity through repeated installation cycles
- Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing consistent performance and interchangeability
- Environmental responsibility through RoHS 3 and REACH compliance, meeting global regulatory requirements
Professional Applications & Engineering Value
These countersunk external tooth lock washers deliver critical vibration-resistant solutions for industrial assemblies where secure fastening is paramount. The black oxide steel construction provides essential corrosion resistance while the precisely engineered 82° countersink angle ensures perfect flush mounting in countersunk holes. The external tooth configuration creates multiple biting points that dig into both the fastener and workpiece, effectively resisting rotational forces and vibration-induced loosening in machinery, automotive, and heavy equipment applications. Manufactured to ASME B18.21.1 standards, these washers maintain dimensional consistency for reliable performance in high-stress environments where fastener security directly impacts operational safety and equipment longevity.
Specification Summary & Compliance
This precision external tooth lock washer features dimensional specifications of 0.14" inner diameter, 0.289" outer diameter, and thickness ranging 0.017-0.021". Manufactured to ASME B18.21.1 standards with Rockwell C40 hardness for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and regulatory adherence for global industrial applications.
