S-97763A284 5/16"-18 x 1 1/4" 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 with Black-Oxide 18-8 Stainless Steel, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable load-bearing capacity and joint integrity
- Precise Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Fully threaded UNC coarse spacing delivers faster installation and enhanced holding power
- 3/16" hex drive design allows for high-torque application with standard tools, reducing slippage
- Rockwell B55 hardness maintains thread form and head integrity under repeated use
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees safety and regulatory acceptance in global markets
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 5/16"-18 UNC rounded head hex screws address common challenges like corrosion, vibration loosening, and assembly efficiency. The Black-Oxide 18-8 Stainless Steel material offers a durable barrier against moisture and chemicals, extending service life in outdoor, marine, or chemical processing equipment. With a coarse thread spacing and fully threaded design, they provide quick fastening and maximum grip in soft materials or high-vibration applications such as machinery frames, automotive components, and structural assemblies. The rounded head style and hex drive ensure flush seating and easy access in confined spaces, reducing installation time and improving overall reliability.
Specification Summary & Compliance
This screw meets ASME B18.3 specifications for dimensional accuracy, with a Class 3A thread fit ensuring tight tolerances and consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances for safe use in various industries. The product adheres to standardized UNC coarse threading and is manufactured to deliver reliable 70,000 psi tensile strength and Rockwell B55 hardness.
