S-92501A502 1/4"-28 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through top lock distorted thread design, preventing loosening in high-motion environments
• Enhanced durability with ASTM Grade C steel construction, ensuring reliable performance under heavy loads
• Precise thread engagement with Class 2B thread fit, providing consistent clamping force and reducing assembly issues
• Easy installation and removal using standard 7/16" external hex drive, compatible with common industrial tools
• Environmental compliance assurance meeting REACH and RoHS 3 standards, safe for regulated industrial applications
• Optimized for fine thread applications with 1/4"-28 UNF right-hand thread, ideal for precision equipment requiring fine adjustment
• Reliable locking performance maintained through distorted thread technology without compromising reusability

Professional Applications & Engineering Value

This 1/4"-28 UNF steel locknut addresses critical vibration-induced failure points in industrial machinery through its innovative top lock distorted thread technology. The ASTM Grade C material provides excellent tensile strength for heavy-duty applications while maintaining corrosion resistance. Engineered with Class 2B thread fit precision, this external hex locknut ensures consistent performance in automotive assemblies, manufacturing equipment, and precision instruments where fine thread UNF specifications are required. The distorted thread profile creates permanent friction locking without damaging mating components, making it ideal for maintenance-sensitive environments. Its 7/16" width provides ample torque surface while maintaining compact dimensions for space-constrained installations.

Specification Summary & Compliance

This locknut features Class 2B thread tolerances per UNF standards with 1/4"-28 fine thread specifications. Manufactured to ASTM Grade C strength requirements with right-hand thread direction and external hex drive. Compliant with REACH (EC 1907/2006) regulations and RoHS 3 (2015/863/EU) directives for environmental safety. Dimensions include 7/16" width across flats and 7/32" height, designed for standard industrial applications requiring reliable vibration-resistant fastening solutions.