S-96278A112 1/2"-13 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the integrated external-tooth lock washer that bites into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion resistance with 18-8 stainless steel construction maintaining integrity in harsh environments and outdoor applications
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly in industrial settings
• Heavy-duty locking performance combining a standard hex nut profile with 400 stainless steel washer for maximum clamping force retention
• Industry-standard compatibility with UNC coarse threads (1/2"-13) providing broad application across machinery and equipment
• Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe use in regulated industries
• Optimized installation efficiency featuring external hex drive for standard wrench access and right-hand threading for conventional assembly

Professional Applications & Engineering Value

This heavy-duty locknut addresses critical vibration-induced failure points in industrial assemblies through its innovative external-tooth lock washer design. The 18-8 stainless steel construction provides exceptional corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements, while the 400 stainless steel washer maintains its locking properties across temperature variations. Engineered with UNC coarse threads and Class 2B thread fit, this fastener delivers reliable performance in heavy machinery, automotive systems, and structural applications where vibration resistance is paramount. The combination of materials and locking mechanism ensures long-term joint integrity without compromising on REACH and RoHS 3 compliance requirements.

Specification Summary & Compliance

This precision 1/2"-13 UNC locknut features Class 2B thread fit for consistent engagement and optimal performance in industrial applications. The fastener system combines an 18-8 stainless steel hex nut with 400 stainless steel external-tooth lock washer, providing dimensional stability with 3/4" width and 7/16" height. Manufactured to industry standards with right-hand thread direction and coarse thread spacing, this component is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental responsibility and workplace safety.