S-91841A205 12-28 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 18-8 Stainless Steel construction, ideal for harsh environments and long-term outdoor use.
- Precise thread engagement due to Class 2B thread fit, ensuring reliable, vibration-resistant connections in critical assemblies.
- Enhanced durability in fine-thread applications with the 12-28 UNF thread, providing greater adjustment precision and load distribution.
- Easy installation and removal using standard tools, thanks to the external hex drive and standard 7/16" width profile.
- Compliance with major environmental regulations, including RoHS 3 and REACH, for safe use in regulated industries.
- Consistent dimensional accuracy with inch system measurements, ensuring interchangeability and reducing assembly errors.
- Right-hand thread design for standard clockwise tightening, compatible with common industrial equipment and practices.
Professional Applications & Engineering Value
This 12-28 UNF fine thread hex nut in 18-8 Stainless Steel is engineered to address common industrial challenges such as vibration loosening and corrosion-induced failure. The fine thread spacing and Class 2B thread fit provide superior clamping force and resistance to dynamic loads, making it ideal for precision machinery, automotive subsystems, and electronic enclosures where reliable, long-term fastening is critical. Its external hex drive allows for high-torque application with standard wrenches, streamlining maintenance and assembly processes in manufacturing and MRO operations. The material's inherent corrosion resistance ensures performance in humid, chemical, or marine environments, reducing downtime and replacement costs.
Specification Summary & Compliance
This hex nut adheres to UNF (Unified National Fine) thread standards with a Class 2B thread fit for consistent dimensional accuracy and interchangeability. Key dimensions include a 7/16" width across flats and 5/32" height. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for use in various industrial and consumer applications.
