S-97149A270 1/2"-20 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance from Black-Oxide coated 18-8 Stainless Steel, ideal for humid or chemically aggressive environments.
• Precise and secure fastening with Class 2B thread fit, ensuring reliable engagement and vibration resistance in assemblies.
• Superior torque transmission via the standard external hex drive profile, compatible with common wrenches for easy installation.
• Optimized for fine-thread applications using the 1/2"-20 UNF thread, providing improved adjustment accuracy and load distribution.
• Full regulatory compliance with RoHS 3 and REACH, making it safe for use in regulated industries and global markets.
• Durable and long-lasting performance due to the combination of stainless steel material and protective black-oxide finish.
• Standard inch dimensions (3/4" width, 7/16" height) ensure easy replacement and compatibility with existing inch-system components.

Professional Applications & Engineering Value

This 1/2"-20 UNF hex nut is engineered to address common industrial challenges such as fastener failure due to corrosion and loosening under dynamic loads. The Black-Oxide 18-8 Stainless Steel construction provides a robust barrier against rust and chemical exposure, extending service life in demanding settings like marine equipment, automotive assemblies, and outdoor machinery. The fine UNF threading and Class 2B thread fit deliver superior clamping force and resistance to vibration, preventing unintentional disassembly. Its external hex drive and standard profile allow for straightforward installation with standard tools, reducing assembly time and improving workflow efficiency in maintenance and production lines.

Specification Summary & Compliance

This hex nut adheres to UNF fine thread standards with a Class 2B thread fit for consistent dimensional accuracy. Manufacturing follows inch system specifications, including a width of 3/4" and height of 7/16". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for hazardous substances.