S-91253A098 3-56 x 3/8" 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
- Exceptional tensile strength of 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 ideal for industrial environments.
- Class 3A thread fit with fine UNF threading delivers superior precision and vibration resistance in critical assemblies.
- Fully threaded design allows for maximum grip and uniform load distribution along the entire length.
- 82° countersink angle and flat head profile enable a flush, secure fit that minimizes protrusion and improves aerodynamics.
- Hex drive (1/16") facilitates easy installation and removal with standard tools, speeding up assembly processes.
- Compliance with ASTM F835, RoHS 3, and REACH guarantees adherence to rigorous safety and environmental standards for global supply chain compatibility.
Professional Applications & Engineering Value
Engineered for precision and durability, these 3-56 UNF flat head screws are ideal for applications demanding high strength and reliable fastening, such as in aerospace, electronics, and machinery assembly. The Black-Oxide Alloy Steel construction resists corrosion and wear, extending service life in harsh conditions. With a fine thread spacing and Class 3A fit, these screws provide excellent vibration resistance and secure connections in tight-tolerance components. The fully threaded design ensures consistent clamping force, reducing loosening over time. Compliant with ASTM F835 and environmental regulations, they offer peace of mind for industrial and engineering projects requiring dependable, high-performance fasteners.
Specification Summary & Compliance
This screw features precise Class 3A thread fit per UNF standards, with a length of 3/8" and fully threaded design for accurate installation. It meets ASTM F835 specifications for mechanical properties, ensuring consistent quality. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations without hazardous substances.
