S-99926A141 1/4"-20 x 1" 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.
- Exceptional thread reliability due to Class 3A thread fit, ensuring precise, secure fastening and reduced risk of cross-threading.
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for durable, long-lasting assemblies.
- Flush, professional installation with undercut flat head and 100° countersink angle, minimizing protrusion and improving aesthetics.
- Efficient torque application via 1/8" hex drive, allowing for quick, stable installation with standard tools.
- Versatile coarse threading (UNC) providing faster assembly and better performance in softer materials or where debris is present.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
These 1/4"-20 UNC flat head screws are engineered to address common industrial challenges such as vibration loosening and corrosion in demanding applications. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to rust and chemical exposure, making them ideal for machinery, automotive, and outdoor equipment. The Class 3A thread fit ensures tight tolerances and reliable performance in high-stress environments, while the undercut flat head design with a 100° countersink angle allows for a smooth, flush surface, reducing snagging and improving safety. Partially threaded options offer controlled clamping force, and the coarse thread spacing facilitates quick installation in various materials, enhancing productivity in assembly lines.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 3A thread fit for high precision and strength. Dimensions include a 1/4"-20 thread size, 1" length, and coarse thread spacing, manufactured to inch system measurements. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial applications requiring reliable, compliant fasteners.
