S-91263A115 2-56 x 1/8" 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 zinc plating that protects against rust and extends service life in harsh industrial environments
- Exceptional tensile strength of 130,000 PSI ensures reliable, vibration-resistant fastening under high-stress conditions
- Class 3A thread fit precision guarantees tight, secure mating with nuts and threaded holes, reducing the risk of loosening
- Fully threaded coarse UNC spacing enables faster installation and improved grip in a variety of materials
- 82° countersink angle and flat head design provides a flush, low-profile finish that minimizes protrusion and enhances safety
- Hex drive (0.050") compatibility allows for easy, high-torque installation with standard tools, speeding up assembly processes
- Rockwell C39 hardness rating offers excellent wear resistance and durability, maintaining performance over repeated use
Professional Applications & Engineering Value
These 2-56 UNC flat head screws are engineered from zinc-plated alloy steel to address common industrial fastening challenges, such as vibration-induced loosening and environmental corrosion. The coarse thread spacing and fully threaded design ensure rapid, secure installation in metal, plastic, and composite assemblies, making them ideal for machinery, electronics, and automotive applications. With a 130,000 PSI tensile strength and Class 3A thread fit, they provide consistent clamping force and reliability in high-load scenarios, reducing maintenance needs and downtime. The hex drive facilitates efficient tool engagement, while the flat head profile and 82° countersink deliver a sleek, safe finish that meets stringent engineering specifications.
Specification Summary & Compliance
This screw features precise Class 3A thread fit per UNC standards, with dimensions including a 1/8" length and 0.050" hex drive. It complies with ASTM F835 for mechanical properties and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
