S-93298A155 1/2"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the precision-engineered nylon insert that maintains locking performance under dynamic loads
• Enhanced load distribution with the 1.07" flange diameter, reducing surface pressure and preventing material damage
• Reliable high-temperature performance with nylon insert rated for continuous service up to 250°F (121°C)
• Precise thread engagement with Class 2B UNF fine threads ensuring secure fastening in critical applications
• Excellent corrosion protection provided by zinc plating, extending service life in various industrial environments
• Heavy-duty construction meeting Grade F strength requirements for demanding mechanical applications
• Easy installation and removal with standard external hex drive compatible with common wrench tools

Professional Applications & Engineering Value

This Grade F zinc-plated steel flange nut with nylon insert locking technology addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and heavy equipment. The UNF fine thread configuration (1/2"-20) provides superior thread engagement density compared to coarse threads, while the Class 2B thread fit ensures consistent clamping force without galling or cross-threading. The integrated flange eliminates the need for separate washers, streamlining assembly while providing a broader bearing surface that prevents pull-through in softer materials. Engineered for heavy-duty applications where thermal cycling and mechanical stress are concerns, this external hex locknut maintains its locking integrity through the nylon insert's elastic memory, even after multiple installation cycles.

Specification Summary & Compliance

This 1/2"-20 UNF flange nut features precise Class 2B thread fit tolerances per UNF standards, with dimensions including 3/4" width, 35/64" height, 1.07" flange diameter, and 0.08" flange thickness. Manufactured from Grade F steel with zinc plating surface treatment, the nut incorporates a right-hand thread nylon insert locking mechanism. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring suitability for global industrial applications with strict chemical substance restrictions.