S-97763A263 1/4"-20 x 1/2" 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 offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance.
- Precise Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening under vibration.
- Easy installation and removal with a 5/32" hex drive, providing superior torque transmission and tool compatibility.
- Full threading and UNC coarse spacing for faster assembly and strong holding power in a wide range of materials.
- Rounded button head design reduces surface damage and provides a low-profile, aesthetically clean finish.
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
Professional Applications & Engineering Value
This 1/4"-20 x 1/2" Black-Oxide 18-8 Stainless Steel Rounded Head Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and the need for high-strength fastening. The Black-Oxide finish on 18-8 stainless steel provides enhanced protection against rust and chemical exposure, making it suitable for outdoor, marine, and chemical processing equipment. Its fully threaded UNC coarse spacing and Class 3A thread fit deliver superior grip and resistance to shake-outs in metal, plastic, and wood assemblies. The hex drive allows for efficient installation in confined spaces, reducing assembly time while maintaining 70,000 psi tensile strength for demanding applications in machinery, automotive, and electrical enclosures.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A precision fit for high-accuracy assemblies. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial and consumer applications.
