S-90729A611 4-40 x 3/16" 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 industrial environments
• Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress applications
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies
• Undercut flat head design with 100° countersink angle allows for flush mounting and reduced risk of head protrusion
• Full threading along the 3/16" length maximizes grip and load distribution across the entire fastener
• Hex drive compatibility with 1/16" drive size enables easy installation and removal with standard tools
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and suitability for global markets

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 4-40 UNC flat head screws in 316 Stainless Steel address critical challenges like corrosion, vibration loosening, and space constraints. The passivated finish enhances durability against chemicals and moisture, while the Class 3A thread fit and coarse thread spacing ensure stable connections in machinery, electronics, and marine equipment. The undercut flat head profile and 100° countersink angle facilitate seamless integration into tapered holes, preventing interference and improving aerodynamics in assembled structures. With full threading and high tensile strength, they provide consistent clamping force, reducing maintenance needs in industrial applications.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for precision, and dimensions in the inch system including a head diameter of 0.255" and length of 3/16". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for regulated industries.