S-91253A335 5/16"-24 x 1" ASME B18.3 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 corrosion resistance from the black-oxide coating, extending service life in harsh industrial environments.
- Superior load-bearing capacity with a high 130,000 psi tensile strength, ensuring reliable performance under stress.
- Precise and secure fastening due to the Class 3A thread fit, minimizing the risk of loosening in vibration-prone applications.
- Optimized for flush mounting with an 82° countersink angle and standard flat head profile, providing a smooth, aerodynamic surface.
- High durability and wear resistance from the alloy steel construction and Rockwell C39 hardness.
- Efficient installation and removal using a standard 3/16" hex drive, allowing for high torque application.
- Guaranteed material safety and compliance with RoHS 3 and REACH regulations, ensuring they are free from hazardous substances.
Professional Applications & Engineering Value
This 5/16"-24 UNF flat head socket screw is engineered to solve critical fastening challenges in precision assemblies. The black-oxide alloy steel construction provides excellent protection against rust and corrosion, making it ideal for automotive, aerospace, and heavy machinery applications where environmental exposure is a concern. The Class 3A thread fit and fine thread spacing ensure a tight, vibration-resistant connection, crucial for maintaining integrity in dynamic systems. The fully threaded design offers maximum grip length, while the 82° countersink angle allows the screw to sit flush, preventing snagging and improving safety. This combination of a right-hand thread and hex drive facilitates quick and secure installation, reducing assembly time and improving overall efficiency in high-volume production environments.
Specification Summary & Compliance
This screw features a Class 3A thread fit for high precision, manufactured to ASME B18.3 and ASTM F835 standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met.
