S-91355A087 5/16"-18 x 1" ASME B18.3, ASTM F835 Steel Flanged Button Head Hex-Drive Screws
Steel Flanged 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 coating, ideal for harsh industrial environments.
- Superior holding power from fully threaded UNC coarse design and Class 3A fit for reliable, vibration-resistant assemblies.
- High tensile strength (120,000 psi) and Rockwell C39 hardness for demanding applications requiring durability.
- Easy installation and removal with 3/16" hex drive and rounded button head, reducing tool slippage and assembly time.
- Enhanced load distribution thanks to the integrated flange, minimizing surface damage and improving joint integrity.
- Compliance with major standards including ASME B18.3, ensuring consistent quality and interchangeability.
- Environmentally safe with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Black-Oxide Alloy Steel Rounded Head Screws address common assembly challenges such as corrosion, vibration loosening, and high-stress fatigue. The UNC coarse threading and Class 3A thread fit provide excellent grip in metals and plastics, reducing the risk of cross-threading and ensuring secure fastening in machinery, automotive, and construction equipment. The flanged design eliminates the need for separate washers, speeding up installation while protecting surfaces. With a Rockwell C39 hardness and 120,000 psi tensile strength, these screws withstand extreme loads and repetitive stress, making them a reliable choice for critical fastening solutions where failure is not an option.
Specification Summary & Compliance
This screw features precise Class 3A thread fit and UNC coarse threading (5/16"-18) for optimal engagement and strength. Manufactured in compliance with ASME B18.3 specifications, it ensures dimensional accuracy and performance reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety standards for global use.
