S-97763A351 1/4"-20 x 3" 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
- Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term performance
- Precise, secure fastening thanks to Class 3A thread fit and UNC coarse thread spacing, reducing the risk of cross-threading
- Efficient installation and removal with 5/32" hex drive, providing a firm grip and minimizing tool slippage
- Full-threaded design ensures maximum engagement and holding power along the entire 3" length
- Compliance with strict industry standards including ASME B18.3, RoHS 3, and REACH for quality and environmental safety
- Versatile rounded button head offers a low-profile finish while distributing clamp load effectively
Professional Applications & Engineering Value
These Black-Oxide 18-8 Stainless Steel Rounded Head Screws are engineered to address critical challenges in demanding industrial settings. The Black-Oxide coating enhances the natural corrosion resistance of 18-8 stainless steel, making these hex drive screws suitable for outdoor equipment, marine applications, and chemical processing plants where moisture and corrosive agents are present. The Class 3A thread fit and UNC coarse threading ensure quick assembly and high resistance to vibration loosening, reducing maintenance needs. With a tensile strength of 70,000 psi, they provide reliable performance in structural assemblies, machinery, and heavy-duty fixtures, ensuring long-term durability and operational safety.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 3A thread fit for precise dimensional accuracy and coarse spacing. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence for global industrial use.
