S-91030A430 3/8"-24 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments.
• Superior vibration resistance due to the integrated flange design, eliminating the need for separate washers and reducing assembly time.
• Reliable, precision threading with Class 2B fine thread fit ensures smooth engagement and minimizes the risk of cross-threading.
• High-strength fastening performance from UNF fine threads, providing greater clamping force and improved load distribution.
• Easy installation and removal with standard external hex drive, compatible with common wrenches for efficient maintenance.
• RoHS 3 compliance meets environmental regulations, making it suitable for global supply chains and sensitive applications.
• Optimized flange dimensions (7/8" diameter, 0.13" thickness) offer a larger bearing surface for secure, stable joints under dynamic loads.

Professional Applications & Engineering Value

This heavy-duty 3/8"-24 UNF flange nut is engineered to address common industrial fastening challenges, such as joint loosening under vibration and corrosion-induced failure. The black-oxide steel construction provides a durable, rust-inhibiting barrier, ideal for outdoor equipment, automotive assemblies, and machinery exposed to moisture or chemicals. Its fine UNF threads and Class 2B thread fit ensure precise, repeatable engagement, reducing installation errors and enhancing reliability in high-stress applications. The integrated flange distributes clamping force evenly, preventing surface damage and maintaining bolt preload—critical for industrial flange nuts used in structural frameworks, conveyor systems, and heavy-duty manufacturing. By combining robust materials with standardized external hex drive compatibility, this nut streamlines maintenance and upgrades, delivering long-term value in demanding environments.

Specification Summary & Compliance

This flange nut adheres to UNF fine thread standards with a Class 2B thread fit for consistent, interchangeable use. Key dimensions include a 3/8"-24 thread size, 11/16" width, 1/2" height, and 7/8" flange diameter with 0.13" thickness, manufactured to precise tolerances. It is RoHS 3 (2015/863/EU) compliant under exemption 6(a) for lead as an alloying element in steel, ensuring environmental safety without compromising mechanical performance.