S-91839A318 1/2"-20 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with Flex-Top locking technology, ensuring secure fastening in high-motion environments
- Excellent corrosion protection from Black-Oxide 18-8 Stainless Steel, ideal for harsh industrial conditions
- Precise thread engagement with Class 2B fit for reliable, consistent performance and reduced risk of cross-threading
- Enhanced durability in fine UNF threading, providing better load distribution and resistance to loosening under stress
- Easy installation and removal using standard external hex drive, compatible with common tools for efficient maintenance
- Compliance with environmental standards including RoHS 3 and REACH, meeting global regulatory requirements
- Right-hand thread design for standard assembly processes, ensuring compatibility with existing systems
Professional Applications & Engineering Value
This 1/2"-20 UNF fine thread locknut is engineered to address critical challenges in industrial settings where vibration and corrosion compromise fastener integrity. The Black-Oxide 18-8 Stainless Steel construction offers robust resistance to rust and chemical exposure, making it suitable for outdoor machinery, automotive assemblies, and marine equipment. The Flex-Top locking mechanism distributes clamping force evenly, maintaining tension under dynamic loads and reducing maintenance downtime. With its Class 2B thread fit, it ensures precise alignment and secure mating with compatible bolts, preventing premature failure in high-stress applications like structural frameworks and heavy-duty manufacturing systems.
Specification Summary & Compliance
This locknut adheres to UNF fine thread standards with a Class 2B thread fit for consistent dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured with a standard hex profile (3/4" width, 39/64" height) and right-hand threading, it aligns with industry specifications for reliable performance in demanding environments.
