S-95355A251 1/2"-20 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments including marine and chemical applications
- Reliable left-hand thread engagement prevents loosening under counter-clockwise rotational forces in specialized machinery
- Precision Class 2B thread fit ensures smooth assembly and consistent clamping force in high-vibration applications
- Fine UNF thread spacing provides enhanced load distribution and superior resistance to vibrational loosening
- Standard external hex profile offers familiar, tool-friendly installation with common wrenches
- RoHS 3 compliance guarantees environmental safety and meets strict international regulatory standards
- Optimized dimensions (3/4" width × 7/16" height) deliver ideal strength-to-weight ratio for space-constrained assemblies
Professional Applications & Engineering Value
This left-hand thread hex nut solves critical reverse-rotation challenges in industrial applications where standard right-hand threads would naturally loosen. Engineered from 316 Stainless Steel, it maintains integrity in corrosive environments that would degrade ordinary fasteners. The UNF fine thread configuration provides superior resistance to vibrational loosening in machinery, automotive, and marine equipment. With its Class 2B thread fit, this nut ensures precise engagement with mating components, reducing installation time and preventing cross-threading damage. The external hex drive style allows for high-torque installation using standard tools, making it ideal for maintenance and production lines where reliability and quick assembly are paramount.
Specification Summary & Compliance
This hex nut features 1/2"-20 UNF left-hand fine threads with Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and reliable performance. Manufactured from 316 Stainless Steel with standard external hex profile measuring 3/4" across flats and 7/16" in height. Compliant with RoHS 3 (2015/863/EU) environmental regulations, meeting international standards for hazardous substance restrictions.
