S-91030A420 1/4"-28 Flange Nuts
Flange Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Flange Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance with black-oxide steel coating, extending service life in demanding environments
- Superior vibration resistance through integrated flange design that eliminates need for separate washers
- Precise thread engagement with Class 2B UNF fine threads ensuring reliable, secure fastening
- Increased clamping force distribution from 5/8" flange diameter protecting joined surfaces
- Easy installation and removal with standard external hex drive compatible with common tools
- Environmental compliance assurance meeting RoHS 3 standards for regulated applications
- Optimized strength-to-weight ratio through fine thread design in right-hand configuration
Professional Applications & Engineering Value
This black-oxide steel flange nut delivers exceptional engineering value across industrial applications where vibration resistance and corrosion protection are critical. The integrated 5/8" flange provides superior load distribution, eliminating washer requirements while preventing surface damage in assembled components. Engineered with 1/4"-28 UNF fine threads and Class 2B thread fit, this fastener ensures precise mating with male threads in automotive, machinery, and equipment manufacturing. The black-oxide surface treatment creates a protective barrier against oxidation, making it ideal for applications exposed to moisture, chemicals, or outdoor conditions. The standard hex profile with external drive allows for efficient installation using common wrench tools, reducing assembly time in production environments.
Specification Summary & Compliance
This flange nut features 1/4"-28 UNF fine threads with Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and reliable performance. Manufactured from steel with black-oxide finish, it delivers consistent quality with flange diameter of 5/8" and height of 5/16". The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, meeting environmental regulations for industrial components.
