S-91627A118 1/2"-13 Flange Nuts

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification, ensuring high clamp load and resistance to vibration loosening.
• Superior corrosion resistance provided by the zinc yellow-chromate plating, extending service life in harsh industrial environments.
• Integrated flange eliminates the need for a separate washer, distributing pressure over a wider area (1 1/32" diameter) for enhanced joint integrity.
• Reliable and fast assembly with UNC coarse threads and Class 2B fit, offering smooth engagement and tolerance for minor debris.
• Standard external hex drive allows for easy installation and removal using common wrenches, improving maintenance efficiency.
• Robust construction from plated steel delivers excellent durability and consistent performance in heavy-duty mechanical systems.

Professional Applications & Engineering Value

This Grade 8 flange nut is engineered to solve critical challenges in heavy-duty applications such as construction equipment, automotive assemblies, and industrial machinery. The zinc yellow-chromate plated steel construction provides a robust barrier against rust and corrosion, significantly reducing maintenance downtime and replacement costs. The integrated 1 1/32" flange acts as a built-in washer, distributing clamp load effectively to prevent surface damage and maintain joint stability under high vibration. Combined with UNC coarse threads and a Class 2B thread fit, this nut ensures quick, reliable fastening even in conditions where fine debris is present, making it an ideal choice for industrial nuts requiring long-term reliability and ease of installation.

Specification Summary & Compliance

This flange nut adheres to UNC coarse thread standards with a 1/2"-13 thread size and Class 2B thread fit for consistent dimensional accuracy. It meets the mechanical properties of Grade 8 strength class, ensuring high tensile performance. The product is manufactured in compliance with industry specifications for external hex drive and standard hex nut profile, and the zinc yellow-chromate plating supports RoHS and REACH environmental directives for safe use.