S-97654A644 4-40 x 3/16" ASME B18.3 Stainless Steel Flanged Button Head Hex-Drive Screws
Stainless Steel Flanged Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments.
- Enhanced load-bearing capability thanks to 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance.
- Precise, secure fastening with Class 3A thread fit, reducing the risk of loosening under vibration.
- Efficient installation and removal using a 1/16" hex drive, minimizing tool slippage and assembly time.
- Increased stability and distribution of clamping force from the flanged design, eliminating the need for separate washers.
- Broad compatibility with UNC coarse threads and right-hand threading for standard industrial applications.
- Compliance with rigorous standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 4-40 UNC Rounded Head Flanged Screw is engineered from 18-8 Stainless Steel to address common industrial challenges such as corrosion and mechanical stress. The flanged button head design provides a wide bearing surface, preventing surface damage and offering vibration resistance in assemblies like machinery, electronics, and automotive components. With a Class 3A thread fit and coarse threading, it ensures quick, reliable fastening in materials where fine threads might strip, reducing downtime. Fully threaded for maximum grip, it meets ASME B18.3 specifications, making it a trusted choice for precision engineering and industrial screw applications requiring durability and regulatory compliance.
Specification Summary & Compliance
This screw features a 4-40 UNC thread size with Class 3A thread fit for high precision and a length of 3/16". It complies with ASME B18.3 manufacturing standards and is fully threaded for consistent performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
