S-90099A033 1/2"-13 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking that maintains secure fastening under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction for long service life in harsh environments
• Enhanced torque application through extra wide hex profile allowing for higher installation forces without stripping
• Reliable high-temperature performance with nylon insert rated for continuous operation up to 250°F (121°C)
• Precise thread engagement with Class 2B thread fit ensuring consistent, reliable mating with mating components
• Industry-standard compatibility with UNC coarse 1/2"-13 threads for broad application across industrial equipment
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

This heavy-duty nylon insert lock nut delivers critical vibration resistance where conventional fasteners fail. The 18-8 stainless steel construction provides inherent corrosion resistance, eliminating galvanic concerns in marine, chemical processing, and outdoor applications. The extra wide hex profile enables higher torque values during installation while reducing the risk of rounding corners. With its UNC coarse threads and Class 2B thread fit, this lock nut ensures reliable performance in heavy machinery, transportation equipment, and structural assemblies where vibration loosening poses significant safety risks. The nylon insert maintains consistent locking force through thermal cycles up to 250°F maximum temperature, making it suitable for engine compartments, industrial motors, and processing equipment.

Specification Summary & Compliance

This lock nut features 1/2"-13 UNC coarse threads with Class 2B thread fit precision manufacturing. The external hex drive measures 7/8" across flats with a 45/64" height. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring restriction of hazardous substances. Right-hand thread direction provides standard installation compatibility across industrial applications.