S-91253A728 1/2"-13 x 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 of 130,000 PSI for reliable performance in high-stress industrial applications.
- Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in demanding environments.
- Precise Class 3A thread fit ensures secure, vibration-resistant connections with minimal risk of loosening.
- Hex drive design provides easy installation and high torque transmission without cam-out.
- Partially threaded shank allows for controlled clamping force and reduced thread galling.
- 82° countersink angle enables flush mounting for a smooth, professional finish.
- Compliance with ASTM F835, RoHS 3, and REACH guarantees material safety and regulatory adherence.
Professional Applications & Engineering Value
These 1/2"-13 UNC flat head hex drive screws are engineered to address critical challenges in heavy machinery, structural assemblies, and automotive applications where vibration resistance and high tensile loads are common. The black-oxide alloy steel construction provides enhanced durability against wear and environmental exposure, while the coarse UNC threading ensures quick assembly and reliable grip in various materials. The partially threaded design minimizes cross-threading risks and distributes stress effectively, making these screws ideal for industrial fastening where precision and longevity are paramount. Their hex drive facilitates efficient installation in confined spaces, reducing labor time and improving project turnaround.
Specification Summary & Compliance
This product adheres to Class 3A thread fit for precise dimensional accuracy and meets ASTM F835 specifications for mechanical properties. It is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory conformity. The screw features a coarse thread spacing with a minimum thread length of 1-1/2" and is manufactured to uphold consistent performance in industrial settings.
