S-90729A413 1/4"-20 x 1" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments like marine or chemical processing.
• Exceptional tensile strength of 70,000 psi ensures reliable load-bearing capacity and reduces the risk of fastener failure in demanding applications.
• Precision Class 3A thread fit guarantees tight tolerances and secure fastening, minimizing backlash and improving assembly accuracy.
• Undercut flat head design with a 100° countersink angle allows for flush mounting, enhancing aesthetics and preventing snagging in machinery.
• Full threading provides consistent grip along the entire length, offering versatile installation options and improved holding power.
• Hex drive compatibility (1/8") enables easy installation and removal with standard tools, reducing assembly time and labor costs.
• Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory adherence for global industrial use.

Professional Applications & Engineering Value

These 1/4-20 UNC flat head screws in 316 stainless steel are engineered to address critical challenges in industrial settings, such as corrosion from moisture, chemicals, or saltwater exposure. The passivated finish enhances durability by forming a protective layer, while the coarse thread spacing and right-hand thread design facilitate quick, secure fastening in materials like metal or plastic. Ideal for applications in aerospace, marine equipment, and food processing machinery, these screws offer a Class 3A thread fit for precision alignment, reducing vibration loosening and maintenance needs. Their fully threaded construction and Rockwell B70 hardness ensure long-term reliability in high-stress environments, making them a cost-effective solution for B2B procurement focused on performance and compliance.

Specification Summary & Compliance

This product adheres to inch system measurements with precise dimensions, including a thread size of 1/4"-20 UNC, Class 3A thread fit for tight tolerances, and a length of 1". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental safety. The manufacturing specifications include a tensile strength of 70,000 psi and Rockwell B70 hardness, supporting consistent performance in industrial applications.