S-91253A283 12-24 x 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head 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 tensile strength of 130,000 psi for reliable performance in high-stress applications
- Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in harsh environments
- Precise Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
- 82° countersink angle design provides flush mounting and improved load distribution
- Full threading capability allows maximum grip length and installation flexibility
- Hex drive compatibility with 1/8" tools enables efficient installation and removal
- Rockwell C39 hardness rating maintains structural integrity under repeated use
Professional Applications & Engineering Value
These 12-24 UNC flat head screws deliver exceptional engineering value for industrial applications requiring reliable fastening solutions. The black-oxide alloy steel construction combined with coarse threading provides superior resistance to vibration loosening, making them ideal for machinery, equipment manufacturing, and automotive assemblies. The fully threaded design ensures maximum engagement in various material thicknesses, while the 82° countersink angle creates seamless flush mounting that prevents snagging and improves aerodynamic profiles. These hex drive screws with 1/8" drive size offer quick installation in confined spaces, significantly reducing assembly time while maintaining the high tensile strength needed for demanding applications.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread specifications in the inch system. These flat head screws comply with ASTM F835 manufacturing standards and feature complete regulatory compliance including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental directives. The dimensional accuracy includes a 0.422" head diameter, 3/4" length, and right-hand thread direction for consistent performance across industrial applications.
