S-92210A113 4-40 x 3/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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 and passivated finish, ideal for harsh industrial environments
- Precise flush installation enabled by standard 82° countersink angle and flat head design for clean, professional finishes
- Exceptional thread reliability with Class 3A fit and UNC coarse threading, ensuring secure fastening in demanding applications
- High mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for long-term structural integrity
- Easy installation and removal with 1/16" hex drive, providing superior torque transfer and reduced tool slippage
- Full threading coverage across the 3/4" length for maximum grip and load distribution in assembled components
- Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
Professional Applications & Engineering Value
These 4-40 UNC flat head screws deliver critical engineering solutions where corrosion resistance, precise flush mounting, and high tensile strength are paramount. The combination of 18-8 stainless steel material and passivated finish provides exceptional protection against chemical exposure and oxidation in manufacturing, electronics, and marine applications. The Class 3A thread fit with coarse UNC threading ensures vibration resistance and prevents loosening in dynamic environments, while the 82° countersink angle allows for seamless integration into precision machinery and equipment housings. These fully threaded screws with hex drive configuration offer reliable performance in assembly lines where consistent torque application and rapid installation are essential for production efficiency.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC coarse thread spacing. Features include 0.255" head diameter, 3/4" length, and 82° countersink angle. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
