S-97763A267 1/4"-20 x 1" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through Black-Oxide coating on 18-8 Stainless Steel, ideal for harsh environments and reducing maintenance costs.
• Superior thread engagement and reliability with Class 3A thread fit, minimizing cross-threading and ensuring secure fastening in critical assemblies.
• High tensile strength of 70,000 psi provides dependable load-bearing capacity, reducing the risk of fastener failure under stress.
• Rockwell B55 hardness offers excellent durability and wear resistance, extending the screw's service life in repetitive use applications.
• Efficient installation and removal with a 5/32" Hex Drive, allowing for high torque application and reducing assembly time.
• Full threading along the 1" length ensures consistent grip and versatility across various material thicknesses.
• Compliance with ASME B18.3 and environmental standards (RoHS/REACH) guarantees product quality, safety, and suitability for regulated industries.

Professional Applications & Engineering Value

This 1/4-20 UNC Rounded Head Hex Drive Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The Black-Oxide 18-8 Stainless Steel construction provides a robust barrier against moisture and chemicals, making it ideal for outdoor equipment, marine applications, and chemical processing plants. The coarse UNC thread and Class 3A fit ensure quick, secure fastening in metals and plastics, reducing installation errors. With its fully threaded design and hex drive, it offers consistent performance in automated assembly lines, machinery maintenance, and structural frameworks, enhancing productivity while meeting stringent ASME B18.3 specifications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a 1/4"-20 UNC coarse thread with Class 3A fit for tight tolerances and reliable performance. It meets ASME B18.3 manufacturing specifications, ensuring consistency and interchangeability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), supporting environmental safety and regulatory requirements in global markets.