S-90729A416 1/4"-20 x 5/8" Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high stress.
- Precision fit and secure fastening ensured by the Class 3A thread fit and UNC coarse thread spacing, reducing the risk of cross-threading.
- Efficient installation and flush seating with a 100° countersink angle and undercut flat head design for a smooth, professional finish.
- High-torque driving capability provided by the 1/8" hex drive, allowing for secure tool engagement and reduced stripping.
- Full threading for maximum grip along the entire 5/8" length, ensuring strong holding power in various materials.
- Compliance with stringent regulations including RoHS 3 and REACH, making it suitable for global industrial and electronic applications.
Professional Applications & Engineering Value
This 316 stainless steel flat head screw is engineered to address critical challenges in demanding sectors such as marine, chemical processing, and food equipment manufacturing, where corrosion resistance and structural integrity are paramount. The passivated finish enhances surface durability, while the Class 3A UNC coarse thread and hex drive facilitate quick, reliable assembly in high-vibration environments. Its undercut flat head and 100° countersink ensure a flush mount, preventing protrusion and improving aerodynamic or aesthetic profiles. With a high tensile strength of 70,000 psi, it provides dependable performance in load-bearing applications, reducing maintenance needs and downtime.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 3A fit for precise dimensional accuracy. Key specifications include a 1/4"-20 thread size, 5/8" length, and fully threaded design. It 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 regulated industries.
