S-91253A353 3/8"-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
- Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in harsh industrial environments.
- Exceptional tensile strength of 130,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
- Fine UNF threading (3/8"-24) offers enhanced grip and load distribution compared to coarse threads, ideal for precision equipment.
- 82° countersink angle and flat head design allows for flush mounting, minimizing protrusion and improving aesthetic finish.
- Hex drive (7/32") compatibility enables easy installation with standard tools, speeding up assembly processes.
- Full threading along the 3/4" length maximizes engagement depth, providing uniform clamping force across joints.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 3/8"-24 UNF flat head screws address common challenges like vibration loosening and material fatigue. The black-oxide alloy steel construction combats rust and wear, making them suitable for automotive, machinery, and structural assemblies where exposure to moisture or chemicals is a concern. With a Rockwell C39 hardness and fine thread profile, they maintain integrity under dynamic loads, preventing strip-outs in high-precision applications. The hex drive and standardized dimensions streamline maintenance, reducing downtime in B2B procurement for repetitive or bulk fastener needs.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit per UNF standards, ensuring exact dimensional accuracy. It meets ASME B18.3 and ASTM F835 specifications for consistent quality and performance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms environmental safety, free from restricted substances, supporting sustainable industrial practices.
