S-91355A089 3/8"-16 x 3/4" 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
- Superior corrosion resistance with black-oxide coating for extended service life in demanding environments
- Exceptional tensile strength of 120,000 psi ensures reliable performance under heavy loads and vibration
- Precision Class 3A thread fit provides superior engagement and reduces the risk of cross-threading during installation
- Integrated flange design eliminates the need for separate washers, simplifying assembly and reducing component count
- Hex drive compatibility with 7/32" drive size allows for high-torque installation using standard industrial tools
- Coarse UNC threading enables faster installation and better performance in softer materials or where debris is present
- Full threading along the entire 3/4" length provides maximum grip and adjustment flexibility in various material thicknesses
Professional Applications & Engineering Value
This black-oxide alloy steel rounded head screw delivers exceptional engineering value in heavy-duty industrial applications where reliability is paramount. The combination of Rockwell C39 hardness and 120,000 psi tensile strength ensures these hex drive screws maintain structural integrity under extreme mechanical stress and vibration. The flanged design distributes clamping force evenly, preventing surface damage while the corrosion-resistant coating protects against environmental degradation in manufacturing, construction, and machinery applications. The 3/8"-16 UNC coarse thread configuration provides superior holding power in metal assemblies, equipment frames, and structural components where Class 3A thread fit guarantees precise, secure fastening without play or backlash.
Specification Summary & Compliance
This rounded head screw features precise Class 3A thread fit according to UNC standards with 3/8"-16 thread size and 3/4" length. Manufactured to meet ASME B18.3 specifications (ASTM F835) with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The screw maintains Rockwell C39 hardness and 120,000 psi tensile strength with fully threaded construction and right-hand thread direction for standardized industrial applications.
