S-97135A424 1/2"-20 Locknuts

Key Features & Benefits at a Glance

• Exceptional vibration resistance through nylon insert locking technology that maintains secure fastening under dynamic loads
• High-temperature durability with nylon insert rated for continuous service up to 220°F (104°C) in demanding environments
• Superior strength performance with Grade 8 steel construction capable of withstanding heavy-duty industrial applications
• Precision fine threading using UNF 1/2"-20 threads for superior engagement and reduced loosening in critical assemblies
• Enhanced corrosion protection through black-oxide surface treatment that provides durable oxidation resistance
• Reliable installation and removal with standard external hex drive design for easy wrench access and torque application
• Regulatory compliance assurance meeting both REACH and RoHS 3 environmental standards for industrial use

Professional Applications & Engineering Value

This Grade 8 nylon insert locknut delivers critical vibration resistance in demanding industrial environments where fastener integrity is paramount. The black-oxide steel construction provides essential corrosion protection while maintaining the high tensile strength required for heavy machinery, automotive assemblies, and industrial equipment. The precision UNF fine threads (1/2"-20) offer superior engagement with mating components, reducing the risk of thread stripping and ensuring consistent clamping force. The nylon insert locking mechanism creates consistent friction that prevents rotation-induced loosening, making it ideal for applications subject to constant vibration or thermal cycling. With temperature resistance up to 220°F, this external hex locknut maintains its locking performance in elevated temperature environments where conventional fasteners might fail.

Specification Summary & Compliance

This heavy-duty locknut features precision Class 2B thread fit with UNF 1/2"-20 fine threads for optimal engagement. Manufacturing complies with industry standards for Grade 8 strength classification, ensuring consistent performance under high stress conditions. Dimensions include 3/4" width across flats and 19/32" height for standard tool compatibility. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, meeting current environmental and safety requirements for industrial fastener applications.