S-91253A092 3-48 x 1/4" 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 (130,000 PSI) ensures reliable performance under high-stress conditions, reducing the risk of fastener failure
- Black-oxide finish on alloy steel provides enhanced corrosion resistance and a durable, non-reflective surface for demanding environments
- Class 3A thread fit delivers precise, tight-tolerance threading for secure, vibration-resistant assemblies in critical applications
- Fully threaded design maximizes grip and load distribution along the entire length, improving joint integrity
- 82° countersink angle allows for flush mounting in standard countersunk holes, creating a smooth, professional finish
- Hex drive (1/16") enables easy installation with standard tools, minimizing slippage and reducing assembly time
- Coarse UNC threading facilitates quick engagement and disassembly, ideal for maintenance and repetitive use scenarios
Professional Applications & Engineering Value
Engineered for industrial and precision applications, these 3-48 UNC flat head screws address common challenges in machinery assembly, electronics enclosures, and automotive components. The black-oxide alloy steel construction combats rust and wear in humid or abrasive settings, while the fully threaded profile ensures uniform stress distribution to prevent loosening under dynamic loads. With a 130,000 PSI tensile strength and Rockwell C39 hardness, they withstand high torque and repetitive adjustments without stripping. The hex drive and coarse thread spacing streamline installation in tight spaces, reducing labor costs and enhancing production efficiency for OEMs and maintenance teams.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit tolerances for precision alignment and meets ASTM F835 specifications for mechanical properties. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. The UNC coarse thread and 82° countersink angle conform to standard inch-system requirements, providing consistent performance across compatible assemblies.
