S-91903A029 1/4"-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
- Enhanced corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Superior load distribution from the extra wide profile, reducing surface pressure and preventing material damage
- High-strength performance meeting Grade 5 standards, suitable for critical structural and heavy-duty applications
- Quick assembly efficiency with UNC coarse threading that resists cross-threading and speeds up installation
- Precise thread engagement through Class 2B fit, ensuring reliable fastening without excessive play
- Secure external hex drive design for easy tool access and high torque application with standard wrenches
- Regulatory compliance assurance with RoHS 3 and REACH standards, meeting international environmental and safety requirements
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel hex nut delivers exceptional engineering value through its robust material selection and precision UNC coarse thread design. The extra wide profile significantly increases bearing surface area, making it ideal for applications where vibration resistance and joint integrity are critical, such as heavy machinery, structural steel connections, and automotive assemblies. The zinc plating provides a sacrificial layer that actively fights corrosion in humid or outdoor environments, while the Class 2B thread fit ensures consistent engagement without binding. These features combine to solve common industrial challenges including fastener loosening under dynamic loads, galvanic corrosion in mixed-material applications, and installation inefficiencies in high-volume production settings.
Specification Summary & Compliance
This 1/4"-20 hex nut features UNC coarse threading with Class 2B thread fit for consistent dimensional accuracy. Manufactured to Grade 5 strength standards with dimensions of 1/2" width and 15/64" height. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety standards are met.
