S-92949A728 1/2"-13 x 4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel 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
- Exceptional corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Superior load-bearing capability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high stress
- Precise, secure fastening ensured by Class 3A thread fit and UNC coarse threads, reducing the risk of cross-threading
- Efficient installation and removal with a 5/16" hex drive, providing excellent torque transmission and slip resistance
- Full-length threading for maximum grip and holding power across the entire 4" shank
- Compliant with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance
- Versatile rounded button head design offers a low-profile, finished appearance while minimizing snagging risks
Professional Applications & Engineering Value
This 1/2"-13 UNC rounded head screw delivers critical engineering value in demanding applications where corrosion resistance and high tensile strength are non-negotiable. Manufactured from 18-8 stainless steel with a passivated finish, it effectively combats rust and chemical degradation in environments like marine equipment, food processing machinery, and outdoor structural assemblies. The coarse UNC thread and Class 3A fit provide superior engagement in a variety of materials, resisting vibration-induced loosening. The combination of a 5/16" hex drive and fully threaded 4-inch length ensures rapid, secure installation in heavy-duty frameworks, industrial machinery, and construction projects, reducing assembly time and maintenance frequency.
Specification Summary & Compliance
This screw features a 1/2"-13 UNC thread with a Class 3A precision fit for high-strength applications. It is manufactured in compliance with ASME B18.3 specifications and is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.
