S-91253A351 3/8"-24 x 5/8" 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
- Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
- Exceptional mechanical strength with 130,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precision thread engagement with Class 3A fine thread fit ensuring vibration resistance and secure fastening
- Optimized flush mounting with 82° countersink angle and standard flat head profile for seamless surface integration
- Enhanced installation efficiency through hex drive design providing superior torque transmission and slip resistance
- Full-threaded construction delivering maximum grip length and load distribution across the entire fastener
- Regulatory compliance assurance meeting international standards for quality and environmental safety
Professional Applications & Engineering Value
These 3/8"-24 UNF flat head screws deliver critical performance advantages in demanding industrial applications where vibration resistance and corrosion protection are paramount. The black-oxide alloy steel construction provides superior durability against environmental factors while maintaining the high tensile strength required for structural assemblies. The Class 3A thread fit ensures precise engagement in critical machinery, automotive components, and aerospace applications where tolerance control is essential. The fine UNF threading offers improved load distribution compared to coarse threads, making these fasteners ideal for high-stress applications requiring reliable, long-term performance without compromising structural integrity.
Specification Summary & Compliance
Manufactured to ASME B18.3 and ASTM F835 specifications with Class 3A thread fit precision. Features include 3/8"-24 UNF fine threading, 5/8" length, 82° countersink angle, and full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across global industrial markets.
