S-97763A353 1/4"-28 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 coated 18-8 Stainless Steel, ideal for harsh environments and reducing maintenance costs.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads, minimizing the risk of fastener failure.
- Precision Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
- Hex drive (5/32") design allows for easy installation and removal with standard tools, speeding up assembly processes.
- Fully threaded construction offers consistent holding power along the entire length, enhancing joint integrity.
- Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for safe, global use.
- Rockwell B55 hardness provides excellent durability and wear resistance, extending the fastener's service life.
Professional Applications & Engineering Value
This 1/4"-28 UNF Class 3A rounded head screw is engineered to address common industrial challenges such as vibration loosening and corrosion in demanding settings. The Black-Oxide 18-8 Stainless Steel material combats rust and chemical exposure, making it suitable for outdoor equipment, marine hardware, and machinery exposed to moisture. With a fine thread spacing and Class 3A thread fit, it delivers superior clamping force and resistance to shock, ideal for precision assemblies in automotive, aerospace, and electronics. The hex drive ensures quick, tool-friendly installation, reducing labor time while maintaining high tensile strength for secure fastening in structural applications.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF fine thread with Class 3A dimensional accuracy, ensuring precise fit and performance. It is manufactured in accordance with ASME B18.3 standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity for industrial use.
