S-91045A033 1/2"-13 Flange Nuts

Key Features & Benefits at a Glance

• Built-in washer functionality eliminates the need for separate washers, reducing assembly time and hardware costs
• Precision leveling capability with up to 1° maximum correction ensures perfect alignment in machinery and structural applications
• Superior corrosion resistance from the black-oxide steel finish provides long-lasting performance in demanding industrial environments
• Heavy-duty construction with a 1 1/8" flange diameter distributes load evenly, preventing surface damage and maintaining joint integrity
• Reliable coarse threading (UNC 1/2"-13) with Class 2B fit ensures smooth installation and secure fastening in high-vibration applications
• External hex drive design allows for standard wrench access, enabling quick installation and removal with common tools
• Environmental compliance with RoHS 3 standards ensures safe use across various industrial sectors and global markets

Professional Applications & Engineering Value

This black-oxide steel flange nut solves critical leveling challenges in industrial machinery installation, structural steelwork, and equipment manufacturing. The integrated 1 1/8" flange acts as a built-in washer, distributing clamping force over a wider area to prevent surface damage to softer materials while providing superior vibration resistance. The UNC coarse thread with Class 2B fit ensures reliable engagement even in applications where thread damage is a concern, while the 1° maximum correction capability allows for precise leveling adjustments without requiring shims or additional components. Engineered for heavy-duty leveling applications, this nut maintains structural integrity while accommodating minor angular misalignments common in industrial assembly processes.

Specification Summary & Compliance

This 1/2"-13 UNC flange nut features Class 2B thread fit per ASME B1.1 standards, ensuring precise thread engagement and reliable performance. The black-oxide steel construction provides corrosion resistance while maintaining mechanical strength. Manufacturing complies with RoHS 3 (2015/863/EU) standards with exemption 6(a) for lead as an alloying element in steel. The nut includes a 1 1/8" flange diameter with 0.19" thickness and 3/16" steel washer integration, designed for industrial leveling applications requiring up to 1° angular correction.