S-97149A100 1/4"-20 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh industrial environments and outdoor applications.
• Reliable, vibration-resistant fastening due to UNC coarse threading, preventing loosening under dynamic loads.
• Precise and consistent thread engagement with Class 2B thread fit, ensuring smooth assembly and reducing the risk of cross-threading.
• Easy installation and removal with a standard external hex drive profile, compatible with common wrenches and sockets.
• Durable, long-lasting performance from the combination of 18-8 stainless steel and black-oxide coating, extending service life.
• Compliance with major environmental regulations including RoHS 3 and REACH, making them suitable for global supply chains and sensitive applications.
• Versatile right-hand threading for standard applications, providing broad compatibility across various machinery and equipment.

Professional Applications & Engineering Value

This 1/4"-20 UNC hex nut is engineered to address common industrial challenges such as corrosion-induced failure and assembly inefficiency. The Black-Oxide 18-8 Stainless Steel construction provides excellent resistance to rust and oxidation, making it ideal for applications in marine, chemical processing, and outdoor infrastructure where moisture and corrosive agents are prevalent. The coarse thread (UNC) design ensures quick installation and superior holding power in materials like cast iron or soft metals, reducing labor time and minimizing the risk of strip-out. Combined with a Class 2B thread fit, these nuts deliver consistent, reliable performance in high-vibration environments such as automotive assemblies, heavy machinery, and construction equipment, ensuring long-term fastener integrity and reducing maintenance downtime.

Specification Summary & Compliance

This hex nut adheres to UNC coarse thread standards with a Class 2B thread fit for consistent dimensional accuracy and compatibility. Key specifications include a thread size of 1/4"-20, a width of 7/16", and a height of 7/32". The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in environmentally conscious industrial applications.