S-90429A123 4-48 x 5/8" 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 black-oxide coating, extending service life in demanding industrial environments.
- Exceptional tensile strength (130,000 psi) ensures reliable performance under high-stress conditions, reducing failure risks.
- Precision Class 3A thread fit guarantees tight, secure fastening with minimal backlash in critical assemblies.
- Fully threaded design provides maximum grip and load distribution along the entire 5/8" length.
- 82° countersink angle and flat head enable flush mounting for streamlined surfaces and improved aesthetics.
- Hex drive (1/16") allows for high-torque installation with standard tools, enhancing assembly efficiency.
- Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH ensures adherence to global quality and safety standards.
Professional Applications & Engineering Value
Engineered for precision and durability, these 4-48 UNF flat head screws in black-oxide alloy steel address common industrial challenges such as vibration loosening and corrosion. The fine thread and Class 3A fit provide superior holding power in applications like aerospace components, electronic enclosures, and machinery where dimensional accuracy is critical. The fully threaded design ensures uniform stress distribution, while the 82° countersink allows for seamless integration into angled surfaces. With a Rockwell C39 hardness and high tensile strength, these screws withstand heavy loads and harsh conditions, reducing maintenance needs and enhancing operational reliability in industrial assembly systems.
Specification Summary & Compliance
This product features precise Class 3A thread fit per UNF standards, with a length of 5/8" and right-hand threading. It complies with ASME B18.3 and ASTM F835 specifications for dimensional and mechanical integrity. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory adherence in global markets.
